SATOBS ML (remote), 4 & 6 Dec 2015: 2010-050B, 2013-070B (Chang'e 2 & 3 rb's)

From: Marco Langbroek via Seesat-l <seesat-l_at_satobs.org>
Date: Mon, 7 Dec 2015 13:48:41 +0100
Chang'e 3 rb:
39459 13 070B   9331 G 20151204113732000 17 75 2246173-202410 56 I+160 01
39459 13 070B   9331 G 20151204114254000 17 75 2246197-202405 56 I+172 01
39459 13 070B   9331 G 20151204114417000 17 75 2246203-202396 56 I+164 01
39459 13 070B   9331 G 20151204114944000 17 75 2246229-202362 56 I+161 01
39459 13 070B   9331 G 20151204115106000 17 75 2246235-202355 56 I+168 01

39459 13 070B   9331 G 20151206121520000 17 75 2323242-204930 56 I+165 01
39459 13 070B   9331 G 20151206121641000 17 75 2323246-204921 56 I+171 01
39459 13 070B   9331 G 20151206122041000 17 75 2323260-204890 56 I+168 01
39459 13 070B   9331 G 20151206122200000 17 75 2323265-204879 56 I+166 01
39459 13 070B   9331 G 20151206122321000 17 75 2323269-204869 56 I+177 01

Chang'e 5 rb:
37175 10 050B   9331 F 20151206132528000 17 75 0649227-384389 56 I
37175 10 050B   9331 F 20151206132808000 17 75 0649300-384529 56 I
37175 10 050B   9331 F 20151206133049000 17 75 0649371-384663 56 I
37175 10 050B   9331 F 20151206133210000 17 75 0649409-384732 56 I
37175 10 050B   9331 F 20151206133608000 17 75 0649516-384937 56 I
37175 10 050B   9331 F 20151206133729000 17 75 0649551-385003 56 I

----------------------------------------------------------------------
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
----------------------------------------------------------------------

More observations on the Chang'e 2 and 3 rb's in trans-Lunar orbit. Obtained 
using the 0.51-m telescope of MPC Q65 Warrumbungle, Australia on Dec 4 & Dec 6, 
2015.

These are select points out of a larger series that document the brightness 
variation.

The flash period of 2013-070B is still changing: I get ~363.95 seconds for the 
time-span Dec 4-6, 2015. Compared to previous values:

date            period (peak-to-peak)
14-9-2015	423.0 s
24-10-2015	384.1 s
6-12-2015	364.0 s

The brightness variation of 2010-050B is still very rapid: 2-3 flashes per 30 
second exposure (i.e. a period of 11-15s).


Updated orbital elements:

2013-070B = Chang'e 3 rb
Perigee 2015 Nov 29.010155 TT =  0:14:37 (JD 2457355.510155)
Epoch 2015 Dec  4.0 TT; Find_Orb

M  90.99543              (2000.0)
n  18.23612557        Peri.   98.67223
a  308542.591 km      Node    81.37052
e   0.7836551         Incl.   20.73368
P  19.74 d            q  66752 km  Q  550334 km

Chang'e 3 rb
1 39459U 13070B   15338.00000000  .00000000  00000-0  00000-0 0    03
2 39459  20.7338 081.5875 7829426  98.7901  90.7633  0.05041882    07

 From 18 observations 2015 Oct 17 - Dec 6; mean residual 0".30


2010-050B = Chang'e 2 rb
Perigee 2015 Dec 5.040033 TT =  0:57:38 (JD 2457361.540033)
Epoch 2015 Dec  6.0 TT; Find_Orb

M  13.95959              (2000.0)
n  14.54174624       Peri.  222.19004
a  358805.533 km     Node   217.04398
e   0.1208113        Incl.   41.28730
P  24.76 d           q  315458 km  Q  402153 km

Chang'e 2 rb
1 37175U 10050B   15340.00000000  .00000000  00000-0  00000-0 0    06
2 37175  41.2858 217.2681 1256797 222.8217  13.3221  0.03995776    06

 From 17 observations 2015 Oct 5 - Dec 6; mean residual 0".42



Same obs as above, but in MPC format:

NET UCAC-4
2013-070B     C2015 12 04.48440 22 46 17.32 -20 14 37.7          16.0 R      Q65
2013-070B     C2015 12 04.48813 22 46 19.70 -20 14 25.7          17.2 R      Q65
2013-070B     C2015 12 04.48909 22 46 20.33 -20 14 22.7          16.4 R      Q65
2013-070B     C2015 12 04.49287 22 46 22.89 -20 14 10.4          16.1 R      Q65
2013-070B     C2015 12 04.49382 22 46 23.48 -20 14 07.8          16.8 R      Q65

2013-070B     C2015 12 06.51065 23 23 24.24 -20 29 34.8          16.5 R      Q65
2013-070B     C2015 12 06.51159 23 23 24.61 -20 29 31.4          17.1 R      Q65
2013-070B     C2015 12 06.51436 23 23 26.00 -20 29 20.3          16.8 R      Q65
2013-070B     C2015 12 06.51528 23 23 26.45 -20 29 16.6          16.6 R      Q65
2013-070B     C2015 12 06.51622 23 23 26.89 -20 29 13.0          17.7 R      Q65

2010-050B     C2015 12 06.55935 06 49 22.72 -38 26 20.0                      Q65
2010-050B     C2015 12 06.56120 06 49 29.96 -38 27 10.3                      Q65
2010-050B     C2015 12 06.56307 06 49 37.14 -38 27 58.7                      Q65
2010-050B     C2015 12 06.56400 06 49 40.89 -38 28 23.4                      Q65
2010-050B     C2015 12 06.56676 06 49 51.62 -38 29 37.4                      Q65
2010-050B     C2015 12 06.56770 06 49 55.09 -38 30 00.9                      Q65

- 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 Mon Dec 07 2015 - 06:49:03 UTC

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