Penumbral and "twin" Iridium flares as predicted

From: Ed Cannon (
Date: Mon Apr 10 2000 - 02:05:14 PDT

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    Last night besides Iridflar predicted side-by-side 
    "twin" negative magnitude flares of Iridiums 77 ? and 
    39 just a few degrees from Polaris, there also was a 
    prediction for a -1 penumbral flare of Iridium 63.  
    In the last couple of years I remember only a couple 
    of penumbral flare predictions.  
    All three flares were pretty much as predicted.  The 
    penumbral one got bright and then disappeared almost 
    immediately -- not your usual Iridium flare.  The 
    other two were separated nominally by only four 
    seconds, and they did appear side-by-side just above 
    and to the left of Polaris and traveled that way at 
    one-power visibility for at least 15 to 20 seconds.
    Poor sky conditions did not allow me to see very many 
    other satellites last night, but there was one very 
    good flash from Iridium 44 (25078, 97-77B), and I did 
    with binoculars see OCS (26062, 00-4B) "occult" epsilon 
    Ed Cannon - - Austin, Texas, USA
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