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La Cañada Observatory, is an initiative by Juan Lacruz, the observatory started astrometric operations in the summer of 2002, it is registered as station J87 in the Minor Planet Center of the International Astronomical Union.

The Observatory also participates in the studies on minor bodies promoted by the Group on Meteorites, Minor Bodies, and Planetary Sciences of the Institute of Space Sciences (CSIC-IEEC).



Wednesday, March 22, 2017

Observaciones 18-marzo-2017


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.

M.P.E.C. 2017-G05                                Issued 2017 Apr. 2, 15:37 UT

                           COMET C/2017 E5 (Lemmon)

Orbital elements:
    C/2017 E5 (Lemmon)
Epoch 2016 June 21.0 TT = JDT 2457560.5
T 2016 June 10.89088 TT                                 MPCW
q   1.7841907            (2000.0)            P               Q
z  +0.0024713      Peri.  306.80147     -0.34692968     -0.86108028
 +/-0.0000581      Node   206.19370     -0.32985556     -0.25899953
e   0.9955907      Incl.  122.63324     -0.87797216     +0.43756141
From 72 observations 2017 Feb. 9-Mar. 31, mean residual 0".5.

    C/2017 E5 (Lemmon)
Epoch 2017 Feb. 16.0 TT = JDT 2457800.5
T 2016 June 10.88593 TT                                 MPCW
q   1.7836531            (2000.0)            P               Q
z  +0.0023796      Peri.  306.78462     -0.34660076     -0.86121194
 +/-0.0000581      Node   206.19649     -0.32990188     -0.25905510
e   0.9957556      Incl.  122.64167     -0.87808466     +0.43726931
From 72 observations 2017 Feb. 9-Mar. 31, mean residual 0".5.

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!

Also, a potentially hazardous Apollo type asteroid  2017 FE1

MPEC F44: 2017 FE1 [a=2.43,e=0.62,i=3.1,H=20.2,PHA]

Epoch 2017 Feb. 16.0 TT = JDT 2457800.5                 MPC
M 329.28424              (2000.0)            P               Q
n   0.26080549     Peri.  201.74297     -0.14480126     +0.98836469
a   2.4261905      Node    59.95814     -0.89970291     -0.11193657
e   0.6227606      Incl.    3.08318     -0.41178547     -0.10298275

The perihelion distance q can be calculated from the semi axis a and eccentricity e as,

q = a * (1-e) = 0.9152546 AU

The Earths semi axis being 1 AU, this means this object crosses the Earth's orbit.

And two new Amor type NEOs,

MPEC F37: 2017 FD1 [a=1.24,e=0.15,i=39.4,H=21.4] 2017 FD1
MPEC F36: 2017 FC1 [a=2.64,e=0.61,i=2.4,H=25.7]  2017 FC1