Re: Iridium 20 exceptional flares

From: Ed Cannon (
Date: Thu Jun 07 2001 - 01:53:38 PDT

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    Two more exceptional flares from Iridium 20 (25578, 98-074B, 
    a.k.a. "20 ?"), both at the Iridflar predicted times on June 5 
    (Monday evening USA time) and the other on June 7 (Wednesday 
    evening).  Monday I was with friends and told the one watching 
    with me that Iridium 20 had been doing brighter-than-predicted 
    flares recently, and sure enough it came through with at least 
    -5.  That makes three that I estimate have been at least five 
    magnitudes brighter than predicted.  The magnitude of the 
    fourth one, Wednesday PM, was more difficult to estimate due 
    to clouds but was definitely a lot brighter than the predicted 
    +2.  Solar elevation was only -6 degrees.  A few minutes later 
    through worsening clouds I was able to see Iridium 45 flare at 
    the predicted time.  Predicted mag. was -4.
    Ed Cannon - - Austin, Texas, USA
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