SATOBS ML (remote), 5 Jul 2015: Chang'e 3 r/b (2013-070B)

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Thu, 09 Jul 2015 14:14:56 +0200
39459 13 070B   9331 G 20150705182659000 17 75 0215526-221841 56 I+156 10
39459 13 070B   9331 G 20150705182819000 17 75 0215539-221865 56 I+165 10
39459 13 070B   9331 G 20150705183224000 17 75 0215582-221940 56 I+178 10
39459 13 070B   9331 G 20150705183345000 17 75 0215597-221966 56 I+158 10
39459 13 070B   9331 G 20150705183506000 17 75 0216010-221989 56 I+165 10
39459 13 070B   9331 G 20150705183629000 17 75 0216025-222013 56 I+174 10
39459 13 070B   9331 G 20150705183749000 17 75 0216039-222038 56 I+180 10
39459 13 070B   9331 G 20150705183912000 17 75 0216053-222068 56 I+182 10
39459 13 070B   9331 G 20150705184033000 17 75 0216067-222091 56 I+166 10
39459 13 070B   9331 G 20150705184153000 17 75 0216080-222114 56 I+164 10
39459 13 070B   9331 G 20150705184315000 17 75 0216094-222138 56 I+177 10
39459 13 070B   9331 G 20150705184714000 17 75 0216135-222211 56 I+168 10
39459 13 070B   9331 G 20150705184836000 17 75 0216147-222233 56 I+155 10
39459 13 070B   9331 G 20150705184956000 17 75 0216162-222258 56 I+168 10
39459 13 070B   9331 G 20150705185119000 17 75 0216175-222282 56 I+172 10
39459 13 070B   9331 G 20150705185357000 17 75 0216201-222329 56 I+167 10
39459 13 070B   9331 G 20150705185519000 17 75 0216214-222353 56 I+152 10


----------------------------------------------------------------------
0.51-meter F/6.3 Dall-Kirkham + CCD + Astrometrica + UCAC4
Warrumbungle Obs., NSW, Australia   31.27517 S, 149.19453 E, 552 m ASL
What these numbers mean: http://www.satobs.org/position/IODformat.html
----------------------------------------------------------------------

Obtained a 30 minute observing arc on the Chang'e 3 r/b, 2013-070B, at that time 
at about 336000 km, or almost 1 Lunar distance, using the 0.51-m telescope of 
Warrumbungle (MPC Q65), Australia.

This observation arc recorded several peaks of a flash cycle, fitting a 7 minute 
period, with the ascending slope steeper than the descending slope and an 
amplitude of about 2.5 magnitude.

The same period and amplitude fits my June 26 observations, but there the
descending slope was steeper.

Same observations as above, but in MPC format:

NET UCAC-4
2013-070B     C2015 07 05.76874 02 15 52.62 -22 11 02.6          15.6 R      Q65
2013-070B     C2015 07 05.76966 02 15 53.94 -22 11 11.3          16.5 R      Q65
2013-070B     C2015 07 05.77250 02 15 58.21 -22 11 38.5          17.8 R      Q65
2013-070B     C2015 07 05.77344 02 15 59.72 -22 11 47.7          15.8 R      Q65
2013-070B     C2015 07 05.77438 02 16 01.03 -22 11 56.2          16.5 R      Q65
2013-070B     C2015 07 05.77534 02 16 02.47 -22 12 04.8          17.4 R      Q65
2013-070B     C2015 07 05.77626 02 16 03.85 -22 12 13.8          18.0 R      Q65
2013-070B     C2015 07 05.77722 02 16 05.31 -22 12 24.5          18.2 R      Q65
2013-070B     C2015 07 05.77816 02 16 06.74 -22 12 32.6          16.6 R      Q65
2013-070B     C2015 07 05.77909 02 16 07.99 -22 12 40.9          16.4 R      Q65
2013-070B     C2015 07 05.78003 02 16 09.40 -22 12 49.6          17.7 R      Q65
2013-070B     C2015 07 05.78280 02 16 13.46 -22 13 16.0          16.8 R      Q65
2013-070B     C2015 07 05.78375 02 16 14.71 -22 13 24.2          15.5 R      Q65
2013-070B     C2015 07 05.78468 02 16 16.15 -22 13 33.4          16.8 R      Q65
2013-070B     C2015 07 05.78564 02 16 17.48 -22 13 41.6          17.2 R      Q65
2013-070B     C2015 07 05.78747 02 16 20.13 -22 13 58.6          16.7 R      Q65
2013-070B     C2015 07 05.78841 02 16 21.41 -22 14 07.2          15.2 R      Q65


Orbit resulting from combining my June 26 obs with these July 5 obs:

2013-070B = Chang'e 3 booster

Perigee 2015 Jul 8.981227 +/- 0.0143 TT = 23:32:58 (JD 2457212.481227)
Epoch 2015 Jul  6.0 TT = JDT 2457209.5                        Find_Orb
M 298.03225 +/- 0.15
n  20.78598673 +/- 0.0509           Peri.   40.10428 +/- 0.055
a  282763.321 +/- 462 km            Node   141.35795 +/- 0.0017
e  0.7243890 +/- 0.00115            Incl.   23.49157 +/- 0.0006
q  77932.6554 +/- 449 km            Q   487593.987 +/- 472 km
P  17.32 days

24 observations 2015 June 26-July 5; mean residual 0".577.

Chang'e 3 rb
1 00000U          15187.00000000  .00000000  00000-0  00000-0 0    05
2 00000  23.4899 141.5720 7239912  39.8984 298.3594  0.05732427    01


- 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
Cospar 4355 (Cronesteyn): 52.13878 N, 4.49937 E (WGS84), -2 m ASL
Station (b)log: http://sattrackcam.blogspot.com
Twitter: _at_Marco_Langbroek
-----


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Received on Thu Jul 09 2015 - 07:15:15 UTC

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