TJM obs of 2007 May 19 UTC

From: Ted Molczan (molczanssl@rogers.com)
Date: Sat May 19 2007 - 06:06:41 EDT

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    30774 07 006C   2701 G 20070519020714510 17 25 1734374+162914 87 S
    30772 07 006A   2701 G 20070519020748900 37 25 1745455+110868 18 S+070 05
    30774 07 006C   2701 G 20070519020748900 37 25 1745455+110868 18 S+070 05
    29651 06 057A   2701 G 20070519033449770 17 25 2223568+452100 37 S
    91117 07 631A   2701 P 20070519085850110 17 25 2118183+174047 47  +090 05
    91117 07 631A   2701 P 20070519085914290 17 25 2120776+165236 97  +090 05
    91117 07 631A   2701 P 20070519085955230 17 25 2125518+153308 47  +090 05
    
    IOD format: http://www.satobs.org/position/IODformat.html
    
    Site 2701: 43.68764 N, 79.39243 W, 230 m
    
    Earlier, I reported my observation of Astro (07006A / 30772) in formation with
    Nextsat (07006C / 30774), on their first pass of the evening, at 02:06 UTC. I
    estimated their separation as 1.3 km:
    
    http://satobs.org/seesat/May-2007/0173.html
    
    On the second pass, at 03:42:05 UTC, at about 991 km range, they were about 0.03
    deg apart (15% of the separation of a pair of nearby reference stars 0.213 deg
    apart). The corresponding linear separation was about 0.5 km. At that point,
    they appeared not to be following each other in a line, but moving on parallel
    tracks, with the left one somewhat ahead of the other.
    
    07631A was about 0.92 s late, and about 0.03 deg off track, relative 2.5 d old
    elements:
    
    1 91117U 07631A   07136.87113666  .00000000  00000-0  00000-0 0    04
    2 91117  50.7137 158.8699 4804182 247.6958  55.6686  5.07303761    06
    
    There seemed to be some variation in brightness, but due to twilight, it was
    near the limit of visibility, so I could not reliably judge its optical
    behaviour.
    
    Ted Molczan
    
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