Re: another brightly flashing near-geosynch

From: Björn Gimle (bg_26934@glocalnet.net)
Date: Thu Jan 05 2006 - 11:12:48 EST

  • Next message: Brad Young: "RE: another brightly flashing near-geosynch"

    In the short run, and if you are within a few degrees of latitude from 
    recent
    observers, you can expect a satellite to flash whenever you see it close
    to the declination and R.A. where those observers did.
    
    In this case, Ed Cannon saw it Jan.01 at RA=02:10 to 02:50, roughly.
    He is at +30N - Brad Young (Dec.27) at +35N, fading from about
    RA 02:20
    
    The long observation times indicate the reflections travel along the 
    satellite
    track, so it is not so sensitive to time/RA. But 0.5 degrees N or S
    (which makes about 4 degrees of latitude) the flashes would be fainter,
    or if there is a slight angular difference between the sat track and 
    flash
    path, the time/RA of the brighest flashes could be hours away in other
    directions.
    
    Over time, the changing RA and declination of the Sun will cause
    similar changes. If observers (preferably from different latitudes)
    can determine the time/RA of brightest flashes over a longer period,
    I can determine the path of flashes, and even the flash cone angle,
    rotation axis, and its precession, to allow predictions for a longer 
    time, and flashes appearing in other parts of the orbit.
    
    /Björn
    
    ----- Original Message ----- 
    From: <mhorina@juno.com>
    To: <seesat-l@satobs.org>
    Sent: Wednesday, January 04, 2006 4:30 PM
    Subject: Re: another brightly flashing near-geosynch
    
    
    > Hello Group,
    >                    Please excuse the newbie question.  I can get the 
    > star =
    > charts etc. to track a near geosync over my location.............  How 
    > do I=
    > know  when the "window of opportunity"  occurs to see this satellite
    > flash=
    > ing?
    > Mark
    > Foley MO
    >
    >
    >
    > -------------------------------------------------------------------------
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