Iridium Flares

From: RobDonRe@aol.com
Date: Fri Jul 13 2001 - 07:00:16 PDT

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    The following flares were sighted during the period 07.01.01 to 07.09.01. All 
    passes were per Heaven's Above predictions. All sightings were at the 
    following location:
    39deg 11min N  119deg 45min W elev. 1430m(4700ft)
    
    07.01.01:   Iridium 19 flared as predicted. Pass was SSE to NNW. Duration of 
                    pass: 16.2 seconds from first sighting to last point of 
    visibility(unaided).
    
    07.02.01:   Iridium 36 flared as predicted. Pass was S to N. Duration of 
    pass: 
                     5.15 seconds.
    
    07.07.01:   Iridium 37 flared as predicted. Pass was S to N. Duration of pass:
                     5.0 seconds. The magnitude of this flare was more in the 
    neighborhood
                     of -3 than the predicted -5.
    
    07.08.01:   Iridium 35 flare was one(1) minute later than predicted. This 
    flare was 
                     seen through a fairly thin cover of clouds. Duration of 
    pass: 4.2 seconds
                     This was the second half of a predicted pass of two(2); 
    Iridium 34, and
                     Iridium 35. This would have been my first two in series, but 
    cloud cover
                     prevented the first pass from being sighted! Some day!!
    
    Cloud cover was a constant problem at this location, and indeed did prevent 
    the
    sighting of other flares predicted for this period.
    
    On another curious note, a predicted flare of Iridium 20 for this location on 
    07.11.01
    at 04:52PDT(11:52UT) was not sighted, however, at 04:54PDT, a very fast moving
    object did flare. The speed of this object startled me, and I failed to stop 
    my stop
    watch quickly, so the duration noted is only approximate.
    Magnitude: -3       Duration of pass: < 1.0 seconds.    Direction of pass: S 
    to N
    The altitude of this object was lower than the predicted Iridium pass by 10 
    to 15deg
    I have not been able to find any other possible identification for this 
    object so far.
    The problem I am having with this beeing Iridium 20 is the speed at which 
    this object passed. I'm still novice at this, but I have not yet seen a 
    predicted flare that
    passed with the speed of a meteor. I have ruled out a meteor due to the manor 
    in
    which this object flared, from a pinpoint of light, to a -3 flare, to a 
    pinpoint of light.
    Any thoughts on this? I'm baffled!
    
    Thanks in advance,
    
    R.(Robert) Morgan
    Carson City, Nevada. USA
    39deg 11mni N  119deg 45min W
    elev. 1430m(4700ft).
    
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