RE: possible launch sighting?

From: Bob Christy (rdc@zarya.info)
Date: Mon Dec 10 2007 - 09:30:13 UTC

  • Next message: Russell Eberst: "2007DEC10.OBS"

    Cosmos 2340 launch was given as Oct 23, 0439 UTC so it was 20:39 local DST
    on Oct 22 in Nome, Alaska where the sighting was reported. The observer says
    "I had just woken up on the morning of the 23rd of October.........".
    
    The departure trajectory was nearly due-east from Plesetsk into a low orbit.
    The ground track was a line across Russia following (very roughly) the
    Tibetan and Chinese borders. It was not visible from Alaska.
    
    Subsequent engine firings of the final rocket stage and of the satellite
    irself took place around 60 degrees south latitude, at perigee of it's
    operational Molniya-type orbit.
    
    Venting from the upper stage being the cause is unlikely as the initial high
    orbit ground track was over the central Atlantic. Venting from one of the
    LEO objects from the launch is just about possible, depending on the actual
    time of the sighting, but it seems a long interval after the actual launch.
    
    Bob Christy
    
    > -----Original Message-----
    > From: Ed Cannon [mailto:edcannonsat@yahoo.com] 
    > Sent: Monday, December 10, 2007 7:11 AM
    > To: seesat-l@satobs.org
    > Subject: possible launch sighting?
    > 
    > I found a report from the vicinity of Nome, Alaska, that 
    > seems like it might be some sort of launch sighting on 
    > October 23.  I found Kevin's brief note here of the launch on 
    > that date of an Oko satellite.  
    > On Jonathan's site I found that it was Cosmos 2340, launched 
    > from Plesetsk.  Plesetsk is at about 40 east and 62 north.  I 
    > believe Okos are in roughly 63-degree orbits, very highly 
    > eccentric, of course.  
    > The person reported the sighting to the west, seen in the 
    > morning.  The report is here:
    > 
    > http://cs.astronomy.com/asycs/forums/t/30002.aspx
    > 
    > If the time matches, etc., it seems to me that maybe the 
    > person saw some segment of that launch.
    > 
    > Ed Cannon - Austin, Texas, USA
    > 
    > 
    > 
    >       
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