Re: Side-by-side red satellites observation

From: Björn Gimle (
Date: Sun Dec 09 2012 - 10:08:08 UTC

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    The only pair I found within +-3 min and 15 deg was two Cosmos 2251
    collision pieces, 15' apart AND 50s in time, AND traveling NNW-SSE.
    If separation was 10' or more it could be the wing tips of a high aircraft.
    NOSS pairs are separated by about 4 degrees (or more), but there are
    science satellites very close.
    In observations reports UTC time should be used (I assumed you are at
    UTC-6), and time and position accuracy and a magnitude estimate, and one
    position between a recognizable star pair and the direction it crosses the
    line would be helpful, complemented by the speed (time to pass your
    binocular FOV), or another position and the time to reach that.
    2012/12/9 Bob King <>
    > Hi everyone,
    > I saw a very interesting pair of satellites red in color moving south
    > to north and separated by ~ 5 arc minutes when near the zenith. Mags
    > were bright south of the zenith at approx mag 1 but then fading. Time
    > was 5:24 p.m. from Duluth, Minn. USA. Each was steady - no flashing -
    > however one grew slightly brighter than the other. Does anyone have
    > any idea what I saw? H-A doesn't show a listing that matches. Are they
    > a NOSS pair or ...?
    > Thank you for your help.
    > Bob
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    Björn Gimle, COSPAR 5919
    59.2576 N, 18.6172 E, 23 m
    Phone: +46 (0)8 571 43 312
    Mobile: +46 (0) 704 385 486
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