RE: Unidentified Satellite - Who Wants/Can Identify?

From: Matson, Robert (ROBERT.D.MATSON@saic.com)
Date: Sat Aug 04 2001 - 17:00:02 PDT

  • Next message: Ted Molczan: "USA 129 elements and observations"

    Hi Ulrich,
    
    > So, it was the morning of July 25th, 2001, 04:00 LT (02:00 UT)
    > plus/minus a few minutes. I was near 8.66E, 50.50N. The satellite
    > rose in the Northeast, underneath Perseus, flashing irregularly
    > to -2 or -3m with a period between 10 and 20 seconds between
    > flashes. It passed above the three brightest stars in Aries
    > (the little triangle which is all you can see of the
    > constellation from lightpolluted sites), then went towards
    > the south, where I lost track of it.
    
    Best match I've been able to find so far is IRS-1A (#18960), but
    I don't know if it's a known flasher or not.  It rose underneath
    Perseus around 1:54 UT, passed just above alpha Aries at 1:54:50,
    and set around 2:01, low in the SSE.
    
    Another satellite on a similar, but higher trajectory (it went
    right through Perseus at 2:03) culminated at 2:04 about 9 degrees
    above alpha Aries, and set at 2:08:45 on a due south heading.
    This was Nadezhda 6 (#26384).  This satellite is at a much
    lower altitude, and thus would have been brighter and travelling
    faster, but again I don't know if this is a flashing satellite.
    
    None of the bright flashing Iridium satellites appears to have
    been in your skies at the time.
    
    Best,
    Rob
    
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