07027B discovery confirmed

From: Ted Molczan (ssl2molcz@rogers.com)
Date: Tue Jul 24 2007 - 07:32:23 EDT

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    Daniel Deak has made the observation that confirms his discovery of 07027B:
    
    http://satobs.org/seesat/Jul-2007/0211.html
    
    The observation arc now consists of the two points that I extracted from Babak
    A. Tafreshi's images of the blow-down, and Daniel's two points:
    
    31702 07 027B   9981 G 20070615173140000 17 25 1044583+052875 58 S
    31702 07 027B   9981 G 20070615173210000 17 25 1109227-012000 37 S
    31702 07 027B   1747 E 20070722055905000 38 25 0013240+151101 19  +040 07
    31702 07 027B   1747 F 20070724052728100 37 25 0347880+333600 38 R+065 07
    
    The following fits with RMS residuals of 0.069 deg, with most of the residual
    manifested as a nearly 0.1 deg cross-track difference relative the Tafreshi
    points:
    
    1 31702U 07027B   07205.21211236 -.00006518  00000-0 -16034-2 0    02
    2 31702  62.2751 298.8740 0657908 219.7582 135.3443 13.68047608    01
    
    The large magnitude of the rate of decay may be an indication of out-gassing
    over the 39 days since launch. The magnitude is similar to that observed during
    the first month in orbit of 05004B / 28538 - the Centaur of the previous NOSS
    launch.
    
    Assuming that the out-gassing has already ceased, then setting decay to a
    nominal low value, and adjusting RAAN, mean anomaly and mean motion to closely
    fit only Daniel's points, yields:
    
    1 31702U 07027B   07205.21211258  .00000041  00000-0  10000-4 0    08
    2 31702  62.2751 298.8744 0657908 219.7582 135.3443 13.68060327    08
    
    Predictions over the next few days should be accurate to within a few seconds of
    time, and a small fraction of a degree in track.
    
    Congratulations Daniel, for spotting the object while doing something other than
    observing, as you related in your earlier post:
    
    http://satobs.org/seesat/Jul-2007/0201.html
    
    The mark of a true observer: always looking up!
    
    Ted Molczan
    
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