tag:blogger.com,1999:blog-14534004914342922782024-03-13T17:49:03.010+00:00LCO Astronomy highlights<b>This blog maintained by Juan Lacruz.
<a href="http://lacanada.es">La Cañada Observatory</a>, Avila, Spain.</b>Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comBlogger192125tag:blogger.com,1999:blog-1453400491434292278.post-43286384841059574312020-07-22T16:25:00.001+01:002020-07-28T10:15:17.453+01:00Observación del cometa C/2020 F3 (NEOWISE) del 17-julio-2020<div class="separator" style="clear: both; text-align: center;">
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El cometa C/2020 F3 (NEOWISE) es peculiar en varios sentidos, por ser considerado como un gran cometa dada su extensión y brillo y por el hecho de haber sido descubierto por un telescopio espacial, el observatorio NEOWISE dedicado a la búsqueda (survey) de objetos cercanos a la Tierra (NEOs) en infrarrojo.<br />
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Hace unos días lo puede observar al amanecer desde el observatorio J87 en La Cañada, pero unos árboles me dificultaron la toma de fotografías a baja altura del cometa y cuando se elevó suficiente para librar ya clareaba el día, aún así puede sacar una pequeña suma de imágenes,<br />
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<tr><td class="tr-caption" style="text-align: center;"><span style="background-color: white; color: #050505; font-family: "segoe ui historic" , "segoe ui" , "helvetica" , "arial" , sans-serif; font-size: 15px; white-space: pre-wrap;">C/2020 F3 (NEOWISE), 11-07-2020 03:38 UT</span></td></tr>
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El fín de semana siguiente el cometa se vería al atardecer a mayor altura sobre el horizonte, ideal para tratar de volver a observarlo y fotografiarlo el viernes 17-07-2020.<br />
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La previsión meteorológica era buena aunque el viernes a media tarde soplaba un viento un poco molesto.<br />
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Como el cometa iba a aparecer bajo en el cielo noroeste y para disfrutar de cielos oscuros nos trasladamos al puerto de La Lancha cerca del observatorio y a unos 1550m de altitud.<br />
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Para hacer la fotografía me llevo el telescopio LX200R de 20cm que es bastante manejable y soporta el peso de la cámara Canon 1D MK IV que voy a utilizar con un objetivo de 70mm a F2.8.</div>
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Montamos el telescopio, aprovecho para limpiarlo que ya acumula polvo.<br />
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Por fín, ya se pone el Sol,<br />
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Llegan algunos amigos con los que hemos quedado para la observación, dada la situación delicada en relación con el COVID19 se respetan en todo momento las precauciones elementales de mascarillas, distancias etc.<br />
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<a href="https://1.bp.blogspot.com/-_WZ0ZzTOKXo/XxhRlot1G7I/AAAAAAAAK0g/onkDckTHmcoDywJPlv9dhFCnPPevQu2xwCLcBGAsYHQ/s1600/IMG-20200719-WA0001.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1066" data-original-width="1600" height="426" src="https://1.bp.blogspot.com/-_WZ0ZzTOKXo/XxhRlot1G7I/AAAAAAAAK0g/onkDckTHmcoDywJPlv9dhFCnPPevQu2xwCLcBGAsYHQ/s640/IMG-20200719-WA0001.jpg" width="640" /></a></div>
Jack con el embalse de Serones al fondo<br />
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<a href="https://1.bp.blogspot.com/-67TYVGWxOO0/XxhgkfUrP4I/AAAAAAAAK1w/YRe_yJqLlqMXS4TA7cbLZPCC9RrNhX0yQCLcBGAsYHQ/s1600/IMG_20200717_215302.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="480" src="https://1.bp.blogspot.com/-67TYVGWxOO0/XxhgkfUrP4I/AAAAAAAAK1w/YRe_yJqLlqMXS4TA7cbLZPCC9RrNhX0yQCLcBGAsYHQ/s640/IMG_20200717_215302.jpg" width="640" /></a></div>
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Aún persiste bastante luz pero el telescopio es obediente y apunta a la zona de Spica la alfa de Virgo que será de lo primero en hacerse visible a simple vista y me servirá para sincronizar el telescopio.<br />
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Ya se ve Spica, centro el telescopio y sin más puesta en estación, desde el ordenador, lo sincronizo y lo envío a la posición donde supuestamente debe estar el cometa.<br />
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Ni a simple vista ni con los prismáticos se ve el cometa, todavía hay mucha luz, dejamos que pasen unos minutos interminables y empiezo a hacer alguna exposición con la cámara. el cometa aparece en una de las primeras imágenes, ya sabemos donde está.<br />
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En cuanto el crepúsculo se acentúa el cometa se hace visible primero en los prismáticos finalmente a simple vista.<br />
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La cámara no deja de hacer fotos a intervalos, a ver como quedan..<br />
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Hemos pasado frío por el viento que no ha cesado, pero la observación a simple vista ha sido excepcional hemos disfrutado de la aparición de un gran cometa, objeto de gran extensión en el cielo y brillo, se podían aprecias tanto la cola de polvo como la cola iónica a simple vista, en la visión con binoculares se salia del campo.</div>
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Las imágenes al estar capturadas con focal de tan solo 70mm no han sido sensibles a las ráfagas de viento y han quedado bien enfocadas, lo mejor que he podido conseguir como resultado es la suma de 7 exposiciones de 30 segundos a ISO 3200.</div>
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<tr><td class="tr-caption" style="text-align: center;">C/2020 F3 (NEOWISE) 17-07-2020 20:51:57 UTC, Puerto de La Lancha, Ávila, Spain</td></tr>
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Para los que quieran profundizar en el porqué de las aparentemente caprichosas formas de los cometas hay un artículo muy bueno de Nicholas Bobrovnikoff disponible en el SAO/NASA Astrophysics Data System que se puede descargar libremente,</div>
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<b>Title:</b><span style="background-color: white;"> The Present State of the Theory of Comets</span><br />
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<b>Authors:</b><span style="background-color: white;"> Bobrovnikoff, N. T.</span></div>
<b>Journal:</b><span style="background-color: white;"> Publications of the Astronomical Society of the Pacific, Vol. 40, No. 235, p.164</span><br />
<b>Bibliographic Code:</b><span style="background-color: white;"> 1928PASP...40..164B</span><br />
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<a href="http://adsabs.harvard.edu/full/1928PASP...40..164B">http://adsabs.harvard.edu/full/1928PASP...40..164B</a></div>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-31061069931984412602018-07-23T18:45:00.000+01:002018-07-23T18:51:48.580+01:00Comet C/2017 S3 PANSTARRS<div class="separator" style="clear: both; text-align: left;">
As observed from La Cañada J87 observatory on the night of 2018-07-22, just before dawn. The comet, at nuclear magnitud 14.7, is after outburst, shows no trace of disruption.</div>
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<a href="https://3.bp.blogspot.com/-0yBcvWs-naE/W1YS59snNKI/AAAAAAAAKrg/PTSe6XtrCFUMXwjPUGcfWsRv0P5utXR1ACLcBGAs/s1600/C2017S3_20180722_J87.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="801" data-original-width="897" height="570" src="https://3.bp.blogspot.com/-0yBcvWs-naE/W1YS59snNKI/AAAAAAAAKrg/PTSe6XtrCFUMXwjPUGcfWsRv0P5utXR1ACLcBGAs/s640/C2017S3_20180722_J87.jpg" width="640" /></a></div>
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MEA J. Lacruz<br />
TEL 0.40-m Ritchey-Chretien + CCD<br />
ACK MPCReport file updated 2018.07.22 10:01:59<br />
AC2 ....<br />
NET UCAC-4<br />
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CK17S030 KC2018 07 22.14054 05 24 39.79 +53 27 28.9 14.7 N J87</div>
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CK17S030 KC2018 07 22.14682 05 24 43.01 +53 27 11.9 14.8 N J87</div>
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CK17S030 KC2018 07 22.15339 05 24 46.45 +53 26 52.9 14.7 N J87</div>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-50748522702655170452017-03-22T19:00:00.004+00:002017-04-04T10:13:34.515+01:00Observaciones 18-marzo-2017<div class="separator" style="clear: both; text-align: center;">
<a href="https://1.bp.blogspot.com/-kBbUgWUgRww/WNLJIFvqoFI/AAAAAAAAKiY/eYoe9wALQ5U1DoJ_q26o4XVVOqgQ5aKQACLcB/s1600/M51_19-Mar-2017_J87.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="340" src="https://1.bp.blogspot.com/-kBbUgWUgRww/WNLJIFvqoFI/AAAAAAAAKiY/eYoe9wALQ5U1DoJ_q26o4XVVOqgQ5aKQACLcB/s640/M51_19-Mar-2017_J87.jpg" width="640" /></a></div>
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Confirmation of four NEOCP objects, one still in the possible comet confirmation page with an arc of 36 days, the preliminary orbit's semi axis a=419 AU and eccentricity e=0.9957 show this could be in a nearly parabolic path coming from the outer Solar system.</div>
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<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">M.P.E.C. 2017-G05 Issued 2017 Apr. 2, 15:37 UT</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;"> COMET C/2017 E5 (Lemmon)</span></div>
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<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">Orbital elements:</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;"> C/2017 E5 (Lemmon)</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">Epoch 2016 June 21.0 TT = JDT 2457560.5</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">T 2016 June 10.89088 TT MPCW</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">q 1.7841907 (2000.0) P Q</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">z +0.0024713 Peri. 306.80147 -0.34692968 -0.86108028</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;"> +/-0.0000581 Node 206.19370 -0.32985556 -0.25899953</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">e 0.9955907 Incl. 122.63324 -0.87797216 +0.43756141</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">From 72 observations 2017 Feb. 9-Mar. 31, mean residual 0".5.</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;"> C/2017 E5 (Lemmon)</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">Epoch 2017 Feb. 16.0 TT = JDT 2457800.5</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">T 2016 June 10.88593 TT MPCW</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">q 1.7836531 (2000.0) P Q</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">z +0.0023796 Peri. 306.78462 -0.34660076 -0.86121194</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;"> +/-0.0000581 Node 206.19649 -0.32990188 -0.25905510</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">e 0.9957556 Incl. 122.64167 -0.87808466 +0.43726931</span><br style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;" /><span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">From 72 observations 2017 Feb. 9-Mar. 31, mean residual 0".5.</span></div>
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<span style="background-color: white; color: #222222; font-family: arial, sans-serif; font-size: 12.8px;">Unfairly enough the contributors to the confirmation of the comet which sent observations to help determine the nature and orbit of this object do not have access to the discovery publication unless the have paid for it, a publication using the observers data and the observers don't have access to it!</span></div>
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<li style="list-style: disc outside; margin: 0px; padding: 0px;">CBET 4380 : 20170402 : <a href="http://www.cbat.eps.harvard.edu/iau/cbet/004300/CBET004380.txt">COMET C/2017 F1 (LEMMON)</a></li>
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Also, a potentially hazardous Apollo type asteroid <a href="http://www.minorplanetcenter.net/db_search/show_object?object_id=2017+FE1&commit=Show">2017 FE1</a></div>
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MPEC F44: 2017 FE1 [a=2.43,e=0.62,i=3.1,H=20.2,PHA]</div>
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Epoch 2017 Feb. 16.0 TT = JDT 2457800.5 MPC</div>
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M 329.28424 (2000.0) P Q</div>
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n 0.26080549 Peri. 201.74297 -0.14480126 +0.98836469</div>
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a 2.4261905 Node 59.95814 -0.89970291 -0.11193657</div>
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e 0.6227606 Incl. 3.08318 -0.41178547 -0.10298275</div>
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The perihelion distance q can be calculated from the semi axis a and eccentricity e as,</div>
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q = a * (1-e) = 0.9152546 AU</div>
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The Earths semi axis being 1 AU, this means this object crosses the Earth's orbit.</div>
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And two new Amor type NEOs,</div>
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MPEC F37: 2017 FD1 [a=1.24,e=0.15,i=39.4,H=21.4] <a href="http://www.minorplanetcenter.net/db_search/show_object?object_id=2017+FD1&commit=Show">2017 FD1</a></div>
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MPEC F36: 2017 FC1 [a=2.64,e=0.61,i=2.4,H=25.7] <a href="http://www.minorplanetcenter.net/db_search/show_object?object_id=2017+FC1&commit=Show">2017 FC1</a></div>
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Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-44467847077566998532016-04-02T21:29:00.005+01:002016-04-07T09:45:10.686+01:00Júpiter 01-abr-2016<div class="separator" style="clear: both; text-align: center;">
<a href="https://3.bp.blogspot.com/-xZt0EkXDkUs/VwArgIvjWSI/AAAAAAAAKHU/4pe219CsmjwjQfjDMqqZ02RZyeETWAkBQ/s1600/J_g4_ap28_jlm.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="627" src="https://3.bp.blogspot.com/-xZt0EkXDkUs/VwArgIvjWSI/AAAAAAAAKHU/4pe219CsmjwjQfjDMqqZ02RZyeETWAkBQ/s640/J_g4_ap28_jlm.jpg" width="640" /></a></div>
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<a href="https://3.bp.blogspot.com/-07grMyNQ8cg/VwK4wMIC-oI/AAAAAAAAKIA/CjfctQv30KQsI3-WKaNDh3br1XCH3letA/s1600/Ju_g3_ap11_jlm.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="610" src="https://3.bp.blogspot.com/-07grMyNQ8cg/VwK4wMIC-oI/AAAAAAAAKIA/CjfctQv30KQsI3-WKaNDh3br1XCH3letA/s640/Ju_g3_ap11_jlm.jpg" width="640" /></a></div>
<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-43736714115627217732015-12-08T22:01:00.003+00:002015-12-10T21:53:30.672+00:00C/2013 US10 CatalinaThe comet C/2013 US10 Catalina observed from La Cañada on Dec the 6th 2015 early morning, the straight plasma tail spans some 3.5 degrees and shows a disconnection event better seen in the black and white reversed image.<div>
<br /><table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://2.bp.blogspot.com/-lMuFDAR7I1A/VmdS70M8AYI/AAAAAAAAKA4/gW1mVijlir4/s1600/C2013US10_CATALINA_06DEC2015_J87.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="408" src="http://2.bp.blogspot.com/-lMuFDAR7I1A/VmdS70M8AYI/AAAAAAAAKA4/gW1mVijlir4/s640/C2013US10_CATALINA_06DEC2015_J87.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">C/2013 US10 Catalina, 6-dec-2015 J87 La Cañada</span></td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://2.bp.blogspot.com/-rHOzc-0X9hQ/VmnzvniJNpI/AAAAAAAAKBM/NgL2gBT3XiM/s1600/C2013_US10_06DEC2015_J87_BW.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="338" src="http://2.bp.blogspot.com/-rHOzc-0X9hQ/VmnzvniJNpI/AAAAAAAAKBM/NgL2gBT3XiM/s640/C2013_US10_06DEC2015_J87_BW.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">C/2013 US10 Catalina, 6-dec-2015 J87 La Cañada</span></td></tr>
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Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-86754666628971486942015-11-21T10:30:00.005+00:002015-12-02T19:26:38.386+00:00Observaciones 13-nov-2015 La CañadaConfirmación de tres objetos publicado en la página de confirmación de NEOs NEOCP<br />
<br />
2015 VG106 Main Belt<br />
2015 VT105 Main Belt<br />
<br />
2015 VA196 NEO Apollo<br />
<br />
Imágenes de confirmación del nuevo asteroide NEO apollo 2015 VA196, observatorio de La Cañada 13-nov-2015
a 1.8232459 e 0.5238127 Incl. 3.74823<br />
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<a href="http://www.minorplanetcenter.net/mpec/K15/K15VG0.html">MPEC K15VG0</a><br />
<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://4.bp.blogspot.com/-DSaz4nTDJi4/VlBEgughQ3I/AAAAAAAAKAE/NwcOA9btkcY/s1600/2015-VA106.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="360" src="http://4.bp.blogspot.com/-DSaz4nTDJi4/VlBEgughQ3I/AAAAAAAAKAE/NwcOA9btkcY/s640/2015-VA106.gif" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">2015 VA196 13-nov-2015 J87 La Cañada</span></td></tr>
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<a href="http://2.bp.blogspot.com/-eTJunN-e66M/Vl9FtCk7wjI/AAAAAAAAKAo/_CvkoaCQask/s1600/integration_ABE_DBE.tif" imageanchor="1" style="margin-left: 1em; margin-right: 1em; text-align: center;"><img border="0" height="430" src="http://2.bp.blogspot.com/-eTJunN-e66M/Vl9FtCk7wjI/AAAAAAAAKAo/_CvkoaCQask/s640/integration_ABE_DBE.tif" width="640" /></a><br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://2.bp.blogspot.com/-IaCoFWJzfXY/VlBEji4jdXI/AAAAAAAAKAY/YmhxJ0OVRsQ/s1600/m31.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="360" src="http://2.bp.blogspot.com/-IaCoFWJzfXY/VlBEji4jdXI/AAAAAAAAKAY/YmhxJ0OVRsQ/s640/m31.gif" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small;">La Galaxia de Andrómeda, suma de 8 imágenes de 2 minutos</span></td></tr>
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Algunas imágenes de Táuridas, son fragmentos del cometa 2P Encke<br />
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<a href="http://4.bp.blogspot.com/-Z53_-iDZAgU/VlBEgdVwIcI/AAAAAAAAJ_8/ebMY9J4ek1g/s1600/M20151116_010136_SPMNAVILA_01P.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="512" src="http://4.bp.blogspot.com/-Z53_-iDZAgU/VlBEgdVwIcI/AAAAAAAAJ_8/ebMY9J4ek1g/s640/M20151116_010136_SPMNAVILA_01P.jpg" width="640" /></a></div>
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<a href="http://3.bp.blogspot.com/-S3dNylN_f1o/VlBEgB9uH1I/AAAAAAAAJ_4/bW0aheMbB5Y/s1600/M20151116_040217_SPMNAVILA_01P.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="512" src="http://3.bp.blogspot.com/-S3dNylN_f1o/VlBEgB9uH1I/AAAAAAAAJ_4/bW0aheMbB5Y/s640/M20151116_040217_SPMNAVILA_01P.jpg" width="640" /></a></div>
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<a href="http://3.bp.blogspot.com/-U-svCVEEEI8/VlBEgqLyy2I/AAAAAAAAKAA/4CisruaUMuw/s1600/M20151116_193741_SPMNAVILA_01P.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="512" src="http://3.bp.blogspot.com/-U-svCVEEEI8/VlBEgqLyy2I/AAAAAAAAKAA/4CisruaUMuw/s640/M20151116_193741_SPMNAVILA_01P.jpg" width="640" /></a></div>
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Descubrimiento de un nuevo objeto del cinturón principal, de momento no tiene órbita publicada, las efemérides están basadas en una aproximación de Väisälä, el asteroide ronda actualmente la magnitud 21V.</div>
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<b>2015 VY144</b><br />
<br />
No published elements available. Ephemeris is based on Generalized Väisälä elements based on observations 2015 Nov. 13-14.<br />
<br />
<a href="http://www.minorplanetcenter.net/iau/info/FurtherObs.html">Further observations?</a> Useful for numbering.<br />
<br />
<br />
<pre> K15VE4Y [H=]
Date UT R.A. (J2000) Decl. El. V Sky Motion
h m s "/min P.A.
2015 11 21 000000 03 04 52.6 +16 51 35 170.4 20.9 0.60 247.9
2015 11 22 000000 03 03 57.2 +16 46 11 169.1 20.9 0.59 247.8
2015 11 23 000000 03 03 02.3 +16 40 50 167.9 20.9 0.59 247.7
2015 11 24 000000 03 02 08.1 +16 35 30 166.7 21.0 0.58 247.6
2015 11 25 000000 03 01 14.6 +16 30 13 165.4 21.0 0.57 247.6</pre>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-32416572074338389562015-08-02T15:46:00.003+01:002015-08-12T16:02:12.310+01:00Saturno, 01-agosto-2015 La Cañada<div class="separator" style="clear: both; text-align: center;">
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<a href="http://3.bp.blogspot.com/-wfKx0vWTsdU/Vctf3EsAWtI/AAAAAAAAJ2c/tIdJyuZo9U0/s1600/saturno1.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="412" src="http://3.bp.blogspot.com/-wfKx0vWTsdU/Vctf3EsAWtI/AAAAAAAAJ2c/tIdJyuZo9U0/s640/saturno1.png" width="640" /></a></div>
<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-4714006569827098412015-07-28T19:37:00.000+01:002015-07-30T17:04:32.015+01:00Crescent Moon and Saturn, 25-Jul-2015<div class="separator" style="clear: both; text-align: left;">
The crescent Moon, bottom right Copernicus 93 km diameter, middle right Eratosthenes 59 km diameter.</div>
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<a href="http://3.bp.blogspot.com/-IzyB6eX2RnY/VbfLf5XHWvI/AAAAAAAAJxU/qbM9H1v4t3I/s1600/Luna.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="364" src="http://3.bp.blogspot.com/-IzyB6eX2RnY/VbfLf5XHWvI/AAAAAAAAJxU/qbM9H1v4t3I/s640/Luna.jpg" width="640" /></a></div>
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Saturn, 4000 mm focal length<br />
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<a href="http://4.bp.blogspot.com/-6zcf5hedvgc/VbpK7zpIuPI/AAAAAAAAJxs/s9EYtJShs_I/s1600/saturn1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="512" src="http://4.bp.blogspot.com/-6zcf5hedvgc/VbpK7zpIuPI/AAAAAAAAJxs/s9EYtJShs_I/s640/saturn1.jpg" width="640" /></a></div>
<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-67901573790477116762015-06-03T12:20:00.003+01:002015-06-09T15:52:27.989+01:00Three new names <b>(325366) Asturias = 2008 QN16</b><br />
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The Principality of Asturias, in northwest Spain, is known for its coastline, mountain landscapes and medieval architecture. The Covadonga Sanctuary to the Virgin Mary, patron of Asturias, sits in a cave above a waterfall.<br />
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<b>(309706) Avila = 2008 GP</b><br />
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Avila de los caballeros, is the capital of the province of Avila in Spain. Sometimes called the Town of Stones and Saints, it is notable for its complete and prominent medieval town walls.<br />
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<b>(352760) Tesorero = 2008 UR4</b><br />
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Pico Tesorero is a prominent pyramidal peak located in the central massif of Picos de Europa in Spain. Its 2570-m summit dominates most of the beautiful mountains of the western and central massifs, and marks the boundary between Asturias, Cantabria and Leon provinces.<br />
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<a href="http://3.bp.blogspot.com/-YyXsT0U_Y-Y/VXb4IFmKZ_I/AAAAAAAAJt0/qRLufeCzLOw/s1600/AsteroideTesorero.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="640" src="http://3.bp.blogspot.com/-YyXsT0U_Y-Y/VXb4IFmKZ_I/AAAAAAAAJt0/qRLufeCzLOw/s640/AsteroideTesorero.jpg" width="444" /></a></div>
Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-2004854412276059432015-05-18T19:26:00.000+01:002015-11-01T19:58:54.517+00:00La Cañada 16-May-2015 NEOCP Observations P10l0Zk -> COMET C/2015 J2 (PANSTARRS)The image below is a stack of short images of NEOCP P10l0Zk taken at La Cañada on the night of 16-May-2015, at that moment only three observations were available at the NEOCP, those by the observatory F51 Pan-STARRS Panoramic Survey Telescope and Rapid Response System.<br />
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Once the object was confirmed by J87 at the predicted position and movement, the astrometry and photometry report was sent to the Minor Planet Center MPC together with remarks on the diffuse aspect of the object. A coma about 8 arc seconds elongated in PA 320 degrees was measured.<br />
<br />
Soon after that, the MPC moved the body from the NEOCP to the Possible Comet Confirmation Page PCCP, the only observations available from the PCCP then were the discovery observations and those of the confirmation by J87.<br />
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The calculations updated May 18.63 UT based on 35 observations spanning 2.89 days showed a nearly parabolic orbit with a semi axis about 100 AU passing the perihelion around 2015 Oct. 17.8<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://1.bp.blogspot.com/-FXfWBYJP1s4/VVookS4R6TI/AAAAAAAAJtY/8Xc4ee_42lM/s1600/P10l0Zk_J87_20150516.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="358" src="http://1.bp.blogspot.com/-FXfWBYJP1s4/VVookS4R6TI/AAAAAAAAJtY/8Xc4ee_42lM/s640/P10l0Zk_J87_20150516.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small; text-align: left;">Picture obtained from observatory J87 La Cañada, this is a stack of 50 images with 1 minute of exposure time each following on the movement predicted by the Minor Planet Center ephemeris Service MPES based on just three observations by F51 Pan-STARRS the night before.</span></td></tr>
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<a href="http://2.bp.blogspot.com/-BlgKh_SOUu0/VVo3FGKsX7I/AAAAAAAAJtk/I9BfqyO0oKs/s1600/P10l0Zk_1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="360" src="http://2.bp.blogspot.com/-BlgKh_SOUu0/VVo3FGKsX7I/AAAAAAAAJtk/I9BfqyO0oKs/s640/P10l0Zk_1.jpg" width="640" /></a></div>
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<br />
Electronic Telegram No. 4100<br />
Central Bureau for Astronomical Telegrams<br />
INTERNATIONAL ASTRONOMICAL UNION
CBAT<br />
Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network<br />
<br />
COMET C/2015 J2 (PANSTARRS)
E. Lilly and R. Weryk, Institute for Astronomy, University of Hawaii,
report the discovery of another apparent comet in three w-band exposures taken
with the 1.8-m Pan-STARRS1 telescope at Haleakala on May 15.5 UT (discovery
observations tabulated below); the object shows a prominent tail with
approximately 8" long extending towards p.a. approximately 300 degrees.<br />
<br />
2015 May UT R.A. (2000) Decl. Mag. <br />
<br />
15.48694 16 10 05.44 -23 22 05.6 19.6<br />
15.49789 16 10 05.12 -23 22 07.0 19.7<br />
15.50882 16 10 04.80 -23 22 08.7 19.6
<br />
<br />
Wainscoat and M. Micheli add that three 60-s r-band follow-up exposures were
taken of the object with the 3.6-m Canada-France-Hawaii Telescope on May 16.5
UT (queue observer D. Woodworth), which show the object clearly cometary in
appearance, with a broad, low-surface-brightness tail that extends from the
nuclear condensation for at least 10" toward p.a. approximately 300 degrees.<br />
<br />
After the comet was posted on the Minor Planet Center's PCCP webpage,
other CCD astrometrists have also noted the object's cometary appearance.
J. Lacruz, Madrid, Spain, reports that sixty stacked 60-s exposures taken with
a 0.40-m Ritchey-Chretien reflector on May 17.0 UT show the comet to be
diffuse with a fan-shaped coma 9" across with an apparent tail in p.a. 320
deg. A. Maury and J.-F. Soulier finds that images taken on May 17.1 with a
0.4-m f/8 Ritchey-Chretien reflector at San Pedro de Atacama show a 11" x 13"
coma and a tail 15" long in p.a. 310 deg; they measured the comet's brightness
in a 6".2 radius to be 18.8. W. H. Ryan communicates that his R-band images
taken on May 18.33-18.36 with the Magdalena Ridge Observatory 2.4-m f/8.9
reflector show a distinct tail at p.a. about 300 deg, and he finds the
comet's magnitude to be 18.6-18.9. H. Sato, Tokyo, Japan, writes that four
stacked 60-s exposures taken with an iTelescope 0.51-m f/6.8 astrograph (+
luminance filter) at Siding Spring on May 18.6 UT show the comet to be
strongly condensed with a coma 10" in diameter and no tail; the w-band
magnitude was 20.2 as measured within a circular aperture of radius 6".6.
The available astrometry, the following preliminary parabolic orbital
elements by G. V. Williams, and an ephemeris appear on<br />
<br />
MPEC 2015-K18.
T = 2015 Oct. 17.8168 TT Peri. = 208.0670
Node = 57.2873 2000.0
q = 4.448423 AU Incl. = 18.7941<br />
<br />
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2015 CBAT
2015 May 19 (CBET 4100) Daniel W. E. Green<br />
<br />
My personal NOTE, shame on the central bureau for astronomical telegrams:<br />
<br />
<div>
Hello Daniel,</div>
<div>
It's not correct the observations by J. Lacruz were done after the object was posted on the PCCP as <span>CBET 4100 states.</span></div>
<div>
To be fair, the remarks on the cometary nature of this object by J. Lacruz should appear rigth after the discovery observations, and before those by Wainscoat and Micheli because the cometary appearance of this body by J. Lacruz was noted and communicated to cbat before others did..</div>
<div>
The observations from La Cañada and remarks noting the cometary appereance were done before the object was posted on the PCCP. At that time the object was posted on the NEOCP and only three observations by the discovery site were available. In summary it was moved to the PCCP because of the remarks sent by J87 when it was in the NEOCP.</div>
<div>
The object was moved to the PCCP right after I sent the remarks on its cometary nature and it appeared there with just the discovery observations together with mine. After that observations by others were added including those taken by the Canada-France-Hawaii Telescope. </div>
<div>
It is not the same to note the cometary nature of such a faint object when it mey just be a <span class="il">NEO</span> that once you know it may most likely be a comet</div>
<div>
Please correct</div>
<div>
<div>
Best regards</div>
</div>
<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-39175225325207120052015-03-25T18:59:00.002+00:002015-03-25T18:59:32.321+00:00Eclipse de Sol, Madrid 20-marzo-2015<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://1.bp.blogspot.com/-E5A1jXvvv4I/VRME564onuI/AAAAAAAAJoc/-GaUR61WdFA/s1600/BK1D5476.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="http://1.bp.blogspot.com/-E5A1jXvvv4I/VRME564onuI/AAAAAAAAJoc/-GaUR61WdFA/s1600/BK1D5476.JPG" height="360" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Eclipse de Sol 20 marzo 2015, desde el Monte del Pardo, Madrid</td></tr>
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<iframe allowfullscreen="" frameborder="0" height="380" src="https://www.youtube.com/embed/Ej84DqNKTQw" width="640"></iframe>Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-14578109097094793002015-03-01T20:33:00.001+00:002015-03-01T20:39:18.309+00:00Comet C/2014 Q2 Lovejoy, 27-Feb-2015 La Cañada<div class="separator" style="clear: both; text-align: left;">
Despite the crescent Moon and some thin cirrus clouds, this is the result of stacking 20 pictures of 45 seconds integration each. Taken with an unmodified Canon 1D MK IV and a zoom EF 70-200 mm F2.8 working at 110mm. In the field of view the Perseus great double cluster, the comet's tail length is about 4 degrees. </div>
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<tr><td class="tr-caption" style="text-align: center;">Comet C/2014 Q2 Lovejoy, 27-Feb-2015 La Cañada Observatory (J87) (c) 2015 Juan Lacruz</td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-22703511939019633172015-01-29T20:52:00.002+00:002015-01-29T20:52:36.842+00:00C/2014 Q2 Lovejoy 24-enero-2015<div class="separator" style="clear: both; text-align: center;">
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<a href="http://1.bp.blogspot.com/-UVzRg12Kqy4/VMqdKlX10KI/AAAAAAAAJjA/zLSe8YU-TpA/s1600/Lovejoy_24-jan-2015_J87.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://1.bp.blogspot.com/-UVzRg12Kqy4/VMqdKlX10KI/AAAAAAAAJjA/zLSe8YU-TpA/s1600/Lovejoy_24-jan-2015_J87.jpg" height="386" width="640" /></a></div>
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<a href="http://3.bp.blogspot.com/-Ba9YwzLA3kY/VMqdQ53KqzI/AAAAAAAAJjQ/Ieyk9_yVZyE/s1600/20150124_180950.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://3.bp.blogspot.com/-Ba9YwzLA3kY/VMqdQ53KqzI/AAAAAAAAJjQ/Ieyk9_yVZyE/s1600/20150124_180950.jpg" height="360" width="640" /></a></div>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-51766197956582136992015-01-09T21:54:00.002+00:002015-02-02T20:27:40.437+00:00Comet C/2014 Q2 Lovejoy<div class="separator" style="clear: both; text-align: left;">
Comet C/2014 Q2 Lovejoy in a mosaic composition, 09-Jan-2015</div>
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(c) 2015 Juan Lacruz, Observatorio de La Cañada</div>
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<a href="http://2.bp.blogspot.com/-mtNrwoVbpUI/VLEbGoWVsCI/AAAAAAAAJdw/BUsuqopCzq4/s1600/C2014Q2_Lovejoy_20150109_J87.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://2.bp.blogspot.com/-mtNrwoVbpUI/VLEbGoWVsCI/AAAAAAAAJdw/BUsuqopCzq4/s1600/C2014Q2_Lovejoy_20150109_J87.jpg" height="208" width="640" /></a></div>
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Inner comma study of comet C/2014 Q2 Lovejoy, the Larson Sekanina rotational gradient enhances the many jets of sublimating volatiles. These get ionized by the Solar wind becoming a plasma that gets trapped in the magnetic field lines, as the comet nucleus rotates these plasma streamers form beatiful knots and the comet displays a vivid greenish electric colour.</div>
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<a href="http://1.bp.blogspot.com/-Z0GNzcLOccg/VLEjCIKAwSI/AAAAAAAAJeA/3FQviGGGgS0/s1600/C2014Q2_Lovejoy-20150109-_J87-Streamers.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://1.bp.blogspot.com/-Z0GNzcLOccg/VLEjCIKAwSI/AAAAAAAAJeA/3FQviGGGgS0/s1600/C2014Q2_Lovejoy-20150109-_J87-Streamers.jpg" height="636" width="640" /></a></div>
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<a href="http://1.bp.blogspot.com/-vHCt53conac/VLg9NyRhekI/AAAAAAAAJgI/e3G8TEut32s/s1600/C2014_Q2_Lovejoy_09-Jan-2015_La_Can%CC%83ada.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="http://1.bp.blogspot.com/-vHCt53conac/VLg9NyRhekI/AAAAAAAAJgI/e3G8TEut32s/s1600/C2014_Q2_Lovejoy_09-Jan-2015_La_Can%CC%83ada.jpg" height="388" width="640" /></a></div>
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Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-43984962325914825752014-08-24T14:43:00.001+01:002014-08-24T14:52:24.655+01:00C/2014 E2 Jacques<span style="font-size: 13px; text-align: left;">Observación del cometa C/2014 E2 Jacques el 23-agosto-2014, foto en color Canon 1D MK IV + EF 400 @ 12500 ISO 10 tomas de 30 segundos. Detalle Telescopio LX200 16" F10 + CCD SBIG STL1001E, 14 imágenes de 30 sec.</span>
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<tr><td class="tr-caption" style="text-align: center;">C/2014 E2 Jacques</td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-45081986108423558512014-01-06T13:03:00.003+00:002014-01-06T13:04:44.854+00:00Andromeda Galaxy M31<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://upload.wikimedia.org/wikipedia/commons/5/5f/M31_j87_2013-12-06.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="https://upload.wikimedia.org/wikipedia/commons/5/5f/M31_j87_2013-12-06.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">M31 the Andromeda Galaxy, <br />
Observatorio de La Cañada<br />
2013-Dec-06 21:52:50 UT 180 secs exposure <br />
Canon EOS 1D + EF 70-200 mm f2.8L USM, ISO 800</td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-23985999924658816042013-12-12T21:47:00.001+00:002013-12-12T21:47:36.509+00:00Comet Lovejoy, an analysis of the inner coma<div class="separator" style="clear: both; text-align: center;">
<a href="http://3.bp.blogspot.com/-FJYfv68ZDlk/Uqou22hEjHI/AAAAAAAAIao/SbDeMZG6QV0/s1600/C2013R1_LoveJoy_J87_20131206.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="640" src="http://3.bp.blogspot.com/-FJYfv68ZDlk/Uqou22hEjHI/AAAAAAAAIao/SbDeMZG6QV0/s640/C2013R1_LoveJoy_J87_20131206.jpg" width="638" /></a></div>
<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-7979432706181168022013-11-30T20:27:00.002+00:002013-11-30T20:28:08.291+00:00Comet ISON fizzles out at the perihelion Comet ISON on its passage by the perihelion seems to have fizzled out the remains don't show a nuclear condensation.<br />
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Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-85079160387466336472013-10-05T06:32:00.000+01:002013-10-06T13:54:49.824+01:00Comet C/2012 S1 ISON on 2013-Oct-05<div class="separator" style="clear: both; text-align: center;">
As the comet approaches perihelion it looks in good condition, no disintegration yet.</div>
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<tr><td class="tr-caption" style="text-align: center;">C/2012 S1 ISON, 2013-10-05 4:19:28 UT J87 Observatory La Cañada (c) Juan Lacruz</td></tr>
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This is the above image aftter being cropped and resized 2x, a false color rendition show better the comma extents. </div>
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<tr><td class="tr-caption" style="text-align: center;">C/2012 S1 ISON, 2013-10-05 4:19:28 UT False color, J87 Observatory La Cañada (c) Juan Lacruz</td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-72843931221131831872013-08-24T06:10:00.001+01:002013-08-24T06:10:28.068+01:00Comet ISON, La Cañada 2013-08-24<div class="separator" style="clear: both; text-align: left;">
Comet ISON was hiden by the Sun a few months, now it is visible again, this picture is a stack taken just before the sunrise from La Cañada.</div>
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<a href="http://2.bp.blogspot.com/-ynGamFV71JY/Uhg-zo3MHDI/AAAAAAAAIF4/-NKawoV3jfw/s1600/C2012S1_ISON_20130824_J87.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="640" src="http://2.bp.blogspot.com/-ynGamFV71JY/Uhg-zo3MHDI/AAAAAAAAIF4/-NKawoV3jfw/s640/C2012S1_ISON_20130824_J87.jpg" width="496" /></a></div>
<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-2592797463310103222013-04-25T19:25:00.001+01:002013-04-25T19:25:31.891+01:00C/2012 S1 ISON & C/2013 H1 La Sagra 2013.04.19<div class="separator" style="clear: both; text-align: left;">
The comet C/2012 S1 ISON continues at mag 15.9R and shows a tail around 30 arc seconds long in position angle 90 degrees.</div>
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Comet ISON is potentially the "comet of the century" because it is expected to become very bright when approaching the perihelion.</div>
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ISON stands for International Scientific Optical Network, a group of observatories in ten countries organized to detect and track objects in space, it is managed by the Keldysh Institute of Applied Mathematics, part of the Russian Academy of Sciences. </div>
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A new object found by the J75 survey La Sagra and posted on the NEOCP has shown cometary features in the initial and confirmation images by various observatories. The initial orbit a=2.5 e = 0.5 has been found to be cometary with a = 27 and e = 1.0, a parabolic, long period orbit.<br />
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References <a href="http://www.minorplanetcenter.net/mpec/K13/K13H27.html">MPEC-2013-H27</a>, <a href="http://www.cbat.eps.harvard.edu/iau/cbet/003400/CBET003485.txt">CBET 3485</a> (subscribers)<br />
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-87412530887483207142013-03-30T20:41:00.004+00:002013-04-01T19:59:00.790+01:00Comet C/2011 L4 PANSTARRS <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="http://1.bp.blogspot.com/-jQgPFDVMgYE/UVnJsEEa5gI/AAAAAAAAHns/C84-mDz46Dc/s1600/DPP07DD0401132F13.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="http://1.bp.blogspot.com/-jQgPFDVMgYE/UVnJsEEa5gI/AAAAAAAAHns/C84-mDz46Dc/s640/DPP07DD0401132F13.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">C/2011 L4 PANSTARRS 30-Mar-2013 20:43 UT La Cañada (c) Juan Lacruz<br />
Canon EOS 1D MK IV + EF 400 mm F5.6 ISO 400, 30 sec</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">C/2011 L4 PANSTARRS 30-Mar-2013 20:44 UT La Cañada (c) Juan Lacruz<br />
Canon EOS 1D MK IV + EF 400 mm F5.6 ISO 400, 30 sec</td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-40120140802025335462013-03-22T22:34:00.001+00:002013-04-01T20:01:07.391+01:00Comet C/2011 L4 PANSTARRS 22-03-2013<div class="separator" style="clear: both; text-align: center;">
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<tr><td class="tr-caption" style="text-align: center;">C/2011 L4 PANSTARRS, 22-03-2013 20:35 UT Madrid<br />
(c) Juan Lacruz</td></tr>
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<tr><td class="tr-caption" style="text-align: center;">C/2011 L4 PANSTARRS, 22-03-2013 20:51 UT Madrid<br />
(c) Juan Lacruz</td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-80018230743051838632013-03-14T19:52:00.001+00:002013-03-16T21:32:23.362+00:00Comet C/2011 L4 PANSTARRS<div class="separator" style="clear: both; text-align: justify;">
<span style="text-align: left;">For a while the clouds opened and gave a chance to shot some pictures of this nice comet C/2011 L4 PANSTARRS from Madrid, Spain. The star to right is Gamma Pegasi, Algenib. </span></div>
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<tr><td style="text-align: center;"><a href="http://3.bp.blogspot.com/-hzWLYEBy7WU/UUInXAbQTdI/AAAAAAAAHlU/Vly5In0FBZk/s1600/BK1D9568.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="http://3.bp.blogspot.com/-hzWLYEBy7WU/UUInXAbQTdI/AAAAAAAAHlU/Vly5In0FBZk/s640/BK1D9568.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small; text-align: left;">C/2011 L4 PANSTARRS Canon EOS 1D + EF 500 @ F4, 0.5 seconds ISO 400.<br />14-March-2013, 19:32 UT Madrid, Spain, (c) Juan Lacruz</span></td></tr>
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<tr><td style="text-align: center;"><a href="http://4.bp.blogspot.com/-Zb7Mmvn0-zU/UUIs-irXj5I/AAAAAAAAHlc/mJ2XE_opTZ8/s1600/BK1D9562.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="http://4.bp.blogspot.com/-Zb7Mmvn0-zU/UUIs-irXj5I/AAAAAAAAHlc/mJ2XE_opTZ8/s640/BK1D9562.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="font-size: small; text-align: left;">C/2011 L4 PANSTARRS Canon EOS 1D + EF 500 @ F4, 1.0 seconds ISO 400.</span><br />
<span style="font-size: small; text-align: left;">14-March-2013, 19:58 UT Madrid, Spain, (c) Juan Lacruz</span></td></tr>
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<tr><td style="text-align: center;"><a href="http://4.bp.blogspot.com/-DFXzGXfxlAY/UUTkdnLqhpI/AAAAAAAAHls/Adg8wRQMpgs/s1600/C2011L4.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="426" src="http://4.bp.blogspot.com/-DFXzGXfxlAY/UUTkdnLqhpI/AAAAAAAAHls/Adg8wRQMpgs/s640/C2011L4.jpg" width="640" /></a></td></tr>
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<tr><td class="tr-caption" style="font-size: 13px;"><span style="font-size: small; text-align: left;">C/2011 L4 PANSTARRS Canon EOS 1D + EF 500 @ F4, 1.0 seconds ISO 400.</span><br />
<span style="font-size: small; text-align: left;">14-March-2013, 20:12 UT Madrid, Spain, (c) Juan Lacruz</span></td></tr>
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<br />Juan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.comtag:blogger.com,1999:blog-1453400491434292278.post-35952651185464626462013-02-14T23:14:00.001+00:002013-02-14T23:14:47.145+00:00Comet ISON 2013-Feb-14<div class="separator" style="clear: both; text-align: center;">
<a href="http://1.bp.blogspot.com/-4aYAYbOgH_8/UR1uwOkhguI/AAAAAAAAHhg/ICJ9HeYVBdU/s1600/C2012-S1-ISON-2013-02-14-J87.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="482" src="http://1.bp.blogspot.com/-4aYAYbOgH_8/UR1uwOkhguI/AAAAAAAAHhg/ICJ9HeYVBdU/s640/C2012-S1-ISON-2013-02-14-J87.jpg" width="640" /></a></div>
Comet ISON doesn't follow the predicted trend and seems stalled at mag 15.9RJuan Lacruzhttp://www.blogger.com/profile/06603189794673740783noreply@blogger.com