Re: Iridium 20 exceptional flares

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Thu Jun 07 2001 - 09:57:43 PDT

  • Next message: Bjoern Gimle: "Re: IMP 8"

    Prediction for Ed's normal site show all flares predicted E of his Austin
    location, even more East from Dripping Springs. So it seems that Ir20? has a
    slight tilt or rotation. There are some flares from the forward MMA of
    Iridiums in that orbital plane, extremely low in the W 1-2 hours later, but
    no more from Ir20 at that latitude within three weeks, nor for mine. I
    haven't checked other latitudes.
    
    20  ? 2001- 6- 1  2:42:30.1 347 14 -13.9 L 0.92 -0.4 -97.4289  60.7 E
    20  ? 2001- 6- 3  2:28:34.9 346 18 -11.3 L 0.79 -1.2 -97.5651  37.4 E
    20  ? 2001- 6- 5  2:14:44.0 345 22  -8.6 L 1.36  0.3 -97.4223  50.6 E
    20  ? 2001- 6- 7  2:00:58.0 345 26  -5.9 L 2.61  2.1 -97.1098  81.5 E
    
    > -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
    
    
    
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