RE: question about NOSS satellites

From: Ted Molczan (ssl3molcz@rogers.com)
Date: Tue Jul 05 2011 - 11:20:57 UTC

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    Sayyed Hamid Reza Ahmadi asked:
    
    > Hi all.
    > 
    > Some years ago (2006 July 28), I saw three objects moving together,
    > which later found to be the NOSS2-1 (C, D, E) triplet.
    > (Actually, that event led to my introduction to SeeSat)
    > 
    > As I recently noticed, the NOSS triplets no longer exist,
    > and in each case, the third object will show half an hour later.
    > 
    > Do we have any other "three satellite formation" up there?
    
    The one remaining U.S. NOSS triad is NOSS 2-1 (90050C / 20691, 90050D / 20692, 90050E / 20642).
    
    Early in 2010, China launched Yaogan 9, which consists of three satellites in an orbit and formation almost identical to
    the U.S. NOSS, and with the same purpose. They are objects 10009A-C, 36413-36415.
    
    Ted Molczan
    
    
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