Re: Genesis-1 observed

From: Edward S Light (light@argoscomp.com)
Date: Fri Jul 14 2006 - 07:18:53 EDT

  • Next message: Russell Eberst: "2006JUL12-14.OBS"

    Dear David,
    
    I observed Genesis-1 and its rocket this morning and found no significant
    discrepancy against predictions made using half-day-old elements (i.e.
    both objects appeared within a second or two of prediction).
    
    The rocket was seen first at about 6th magnitude from 07:04.5 to 07:05.4
    UTC (2006 July 14th).  Then, from 07:12.4 to 07:12.9, the Genesis itself
    from 4-1/2 to 5 magnitude.
    
    Very surprising, though, was an apparent pass of the Cosmos 2421 = 06-026A
    satellite.  At about 07:18.5, it emerged from shadow VERY bright (i.e.
    brighter than Deneb but fainter than Vega) in Cepheus.  As I followed it
    downward, it didn't seem like an Iridium-like flare (unless it was a
    very long one - some trees prevented me from following it).  A search
    using all available TLEs failed to come up with a viable alternate
    to 29247. 
    
    IOD data:
    29253 06 029B   8840 F 20060714070427000 28                      S+058 03
    29253 06 029B   8840 F 20060714070525000 28                      S+063 03
    29252 06 029A   8840 F 20060714071226000 28                      S+044 03
    29252 06 029A   8840 F 20060714071255000 28                      S+053 03
    29247 06 026A   8840 F 20060714071832000 28                      S+006 03
    
    What these numbers mean: http://www.satobs.org/position/IODformat.html
    
    Clear and dark skies!
       Ed Light
    
    Lakewood, NJ, USA
    Site 8840, N 40.1075, W 074.2312, +24 m (80 ft)
    
    On Fri, 14 Jul 2006, David Anderman wrote:
    
    > I believe that I observed Genesis-1 this morning, although it 
    > appeared some 6 minutes early (I was not yet set up to observe when 
    > this bright object passed overhead). The object was only observable 
    > for about a minute before it passed into shadow, but it seemed to 
    > significantly become brighter during that one minute; either a solar 
    > panel or some other structure was illuminated by the sun (although 
    > the object was flying between myself and the Sun) or it was tumbling, 
    > albeit at a slow rate.
    > 
    > Is Genesis-1 generating so much drag due to its inflation that it 
    > could arrive 5 or 6 minutes early? Or, has Genesis-1 manuevered in orbit?
    > 
    > Also, I notice that the upper stage is diverging significantly from 
    > Genesis-1, could this be a function of Genesis-1 drag?
    
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