RE: UNID Flasher

From: Paul Henney (
Date: Sat Aug 30 2003 - 07:43:36 EDT

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    I think C654 is the "closer fit", the trajectory onf C1104 seems too "steep"
    Thanks for the detective work!
    -----Original Message-----
    From: Björn Gimle [] 
    Sent: 30 August 2003 11:39
    To: Paul Henney
    Subject: Re: UNID Flasher 
    I interpret your text as saying "something culminating near azimuth 225 and
    moving near az 195 alt 25, heading to horizon near az 135", and find nothing
    In general, and in particular when only a short arc is observed, or it is
    observed through binoculars, it is more useful to estimate the track's local
    angle relative to the vertical, or to a pair of stars in the field of view.
    An estimate of apparent speed is also helpful.
    In Henney2.gif, Cosmos 1104 moves in dir=215 approximately, and Cosmos 654
    in about 235 degrees. Both are "too late".
    Do they fit ?
    If you have a graphic tool like SkyMap or ObsReduce, you can read the cursor
    alt/az or RA/Dec (in SkyMap) or mark a star and a distance and direction
    from it and read them from the screen or a log file. With one point in
    RA/Dec, you can use IdSat to get matching suggestions, but two points give a
    mutch safer ID, using a graphic prediction tool or even an orbit
    determination program.
    ----- Original Message ----- 
    From: "Paul Henney" <>
    To: <>
    Sent: den 29 augusti 2003 22:56
    Subject: UNID Flasher
    > 20:50 hrs UT (approx)
    > Sheffield UK 53.3830N, 1.4660W
    > +220M OD
    > Out walking the dog, saw a slow flasher, period about 3 seconds maxima
    > +1, fading to invisible, 2nd maxima about +3
    > Moving NW - SE through Scutum area. Only saw it for about 15 seconds 
    > in total.
    > ???
    > Pj
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