Unid Naked-Eye Flashing Geosych

From: Kent Yeglin (ky@yeglin.com)
Date: Thu May 20 2004 - 03:32:56 EDT

  • Next message: Tony Beresford: "Re: Unid Naked-Eye Flashing Geosych"

    Looked for the three geo sats Ed Cannon reported in his informative 5/17 
    report: Gorizont 13, ASC 1 and GStar 3. Using my 7x50, I observed Gorizont 
    13 in the position predicted by SatSpy 4.0 and with the parameters 
    described by Ed: 86 sec. period, +4 mag. While hunting the other two sats, 
    I observed an object flashing with a 72 sec. period and an estimated +2.5 
    magnitude (observed naked eye) at the following coordinates (these should 
    be accurate to within about 10 arc minutes):
    
    04-05-19 05:46:57 UTC: RA 14h 9m 41s  DEC -2.1
    04-05-19 05:59:00 UTC: RA 14h 21m 34s DEC -2.5
    04-05-19 06:23:00 UTC: RA 14h 45m 23s DEC -3.4
    
    My predictions for ASC 1 and GStar 3 put them just out of the FOV to the 
    east at these times. I did not see them at their predicted positions. The 
    only sat that fits the observed position is Aussat K2 (85-109C, 16275). I 
    haven't seen any references to any of the Aussats flashing, so I'm doubful 
    that's what I saw. My elsets for the sats in question were less than four 
    days old.
    
    I attempted a reobservation this evening for 45 min. up until 05:00 and 
    saw no geosats (did have two LEOs come through the FOV, though). Was 
    unable to observe at the same times as last evening due to encroachment of 
    the coastal fog.
    
    Has anyone used SatSpy for geosat predictions? I've used it for four years 
    for LEO predictions and (except for sometimes odd window behavior) have 
    been quite happy with it, but have only recently applied it to geosat 
    predictions. I wonder whether it's optimized for that.
    
    Site: 37.830N, 122.262W, 40m
    
    Regards,
    
    Kent Yeglin
    Oakland, CA, USA
    
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