SATOBS ML (remote), 14-15 Jun 2015: 2010-050B (Chang'e 2 rb)

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 15 Jun 2015 23:36:14 +0200
Chang'e 2 r/b observations:

37175 10 050B   8438 F 20150614065015214 17 75 1732209+269930 56 S+151 10
37175 10 050B   8438 F 20150614065055342 17 75 1732215+269958 56 S+152 10
37175 10 050B   8438 F 20150614065135387 17 75 1732221+269987 56 S+153 10
37175 10 050B   8438 F 20150614065215339 17 75 1732227+270014 56 S+154 10
37175 10 050B   8438 F 20150615065600458 17 75 1815447+321589 56 S+159 10
37175 10 050B   8438 F 20150615065840065 17 75 1815478+321698 56 S+157 10
37175 10 050B   8438 F 20150615070100162 17 75 1815507+321793 56 S+158 10
37175 10 050B   8438 F 20150615070340266 17 75 1815539+321900 56 S+156 10

-------------------------------------------------------------------------
0.61-meter F/10 Cassegrain + CCD + Astrometrica software + UCAC4
Sierra Stars Obs. (MPC G68), Markleeberg, California, USA,
38.8108 N, 119.7750 W, 1545 m
What these numbers mean: http://www.satobs.org/position/IODformat.html
-------------------------------------------------------------------------

Observations of the Chang'e 2 r/b in translunar orbit, made 'remote' with the
0.61-m telescope of Sierra Stars Observatory (MPC G68) in California.

Imaged at a distance of 430000-410000 km. As to the why: simply because it is
cool to do! And this is an extremely distant object not in the Space-Track
catalogue  (it is in the MPC ART SAT database though).

Using Bill Gray's FindOrb and combining the above obs with the obs early May:

http://www.satobs.org/seesat/May-2015/0081.html
http://www.satobs.org/seesat/May-2015/0090.html

...I get this approximate orbit:

Chang'e 2 rb
1 00000U          15166.00000000  .00000000  00000-0  00000-0 0    02
2 00000  40.5742 226.2289 2290925 168.2062 269.1615  0.03405342    00

         from 31 observations 2015 May 7-June 15; mean residual 0".690


Perigee 2015 Jun 22.432600 +/- 0.000207 TT = 10:22:56 (JD 2457195.932600)
Epoch 2015 Jun 15.0 TT = JDT 2457188.5                        Find_Orb
M 268.12214 +/- 0.0028
n  12.36146832 +/- 3.39e-5          Peri.  169.21724 +/- 0.0022
a  399843.583 +/- 0.732             Node   226.01125 +/- 0.00008
e  0.2300816 +/- 3.85e-6            Incl.   40.57546 +/- 0.00008
q  307846.914 +/- 1.44              Q   491840.253 +/- 2.04 km
P  29.12d                 H 27.7


Same observations in MPC format:

NET UCAC-4
2010-050B     C2015 06 14.28490 17 32 20.87 +26 59 34.9          15.1 R      G68
2010-050B     C2015 06 14.28536 17 32 21.48 +26 59 45.0          15.2 R      G68
2010-050B     C2015 06 14.28582 17 32 22.13 +26 59 55.3          15.3 R      G68
2010-050B     C2015 06 14.28628 17 32 22.72 +27 00 05.2          15.4 R      G68
2010-050B     C2015 06 15.28906 18 15 44.65 +32 09 31.9          15.9 R      G68
2010-050B     C2015 06 15.29091 18 15 47.84 +32 10 11.3          15.7 R      G68
2010-050B     C2015 06 15.29253 18 15 50.72 +32 10 45.6          15.8 R      G68
2010-050B     C2015 06 15.29439 18 15 53.91 +32 11 24.0          15.6 R      G68

- Marco

-----
Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
e-mail: sattrackcam_at_langbroek.org

Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
Station (b)log: http://sattrackcam.blogspot.com
Twitter: _at_Marco_Langbroek
-----


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Received on Mon Jun 15 2015 - 16:36:36 UTC

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