RE: Iridum 33 and Cosmos 2251 Still Listed by Spacetrack

From: Geoffrey E. Forden (forden@MIT.EDU)
Date: Fri Feb 13 2009 - 19:36:17 UTC

  • Next message: Kevin Fetter: "Re: Iridum 33 and Cosmos 2251 Still Listed by Spacetrack"

    We saw similar things for the first week after the Chinese ASAT test.  My
    guess is that these TLEs are being determined by the radar fence in Texas
    which says a satellite passes directly over it when the max radar bounce
    takes the minimum time.  (I think that's the way it works.)  If that is the
    case, it estimates a location for a max to the swarm of debris.  Does this
    agree with other people's understanding of that fence?
    Geoff Forden
    
    -----Original Message-----
    From: Gerhard HOLTKAMP [mailto:grd.holtkamp@t-online.de] 
    Sent: Friday, February 13, 2009 2:26 PM
    To: SeeSat-L@satobs.org
    Subject: Iridum 33 and Cosmos 2251 Still Listed by Spacetrack
    
    
    The colliding sats Iridium 33 and Cosmos 2251 are still listed by Spacetrack
    
    with epochs after the collision. The *new* Iridium 33 (the one with the 
    post-collision elset) is significantly trailing the pre-collision elset
    while 
    it's the other way around with the Cosmos 2251 elsets. Presumably these are 
    now the largest surviving post-collision pieces?
    
    Gerhard HOLTKAMP
    Darmstadt, Germany
    
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