RE: No 22702

From: Richard Baldridge (RBaldridge@Filss.com)
Date: Mon Feb 07 2000 - 09:47:25 PST

  • Next message: finn@main.jetnet.ab.ca: "Reentry Shields"

    	I thought I had predictions for a known geosynch 
    	flasher in that location in the sky, and Mike found that 
    	TDF 1 (19621, 88-98A) was a good match.  Either the period 
    	or the half-period was about 16.5 seconds.
    
    
    Looks like the above 16.5 seconds is the HALF-period for TDF-1 based on
    flash period observations from previous SeeSat posts:
    Aug 16, 99 - period 29.24 sec -- Rick Baldridge
    Aug 23, 99 - period 29.666 sec - Rob Matson
    Aug 31, 99 - period 30.27 sec - Rick Baldridge
    Sep 19, 99 - period 31.79 sec - Tony Beresford, Australia
    Sep 23, 99 - period 32.11 sec - Tony Beresford
    
    Current Elset:
    TDF-1   
    1 19621U 88098A   00031.00678155 -.00000222 +00000-0 +10000-3 0 02431
    2 19621 002.8278 079.6649 0005558 203.9212 156.0164 00.99195457038206
    
    If you haven't seen this naked-eye geo-flasher, I highly recommend it.  Some
    flashes can reach +1 mag.  But like Superbird-A, the flashes are only
    visible during a specific "window" of about 25 minutes in duration.  Further
    observations are needed to define the rotational axis and observing windows
    across the USA.
    
    RICK BALDRIDGE
    Campbell, CA
    N37.262 W121.977
    
    
    
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