Re: suggest a Geosat

From: B Gimle @ComHem (@ComHem)
Date: Thu Mar 05 2009 - 08:33:22 UTC

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    Like Ed said, most important to know is the geosats' declination,
    and where the shadow is located, not what satellite to point to.
    If you do not use my spreadsheet, assume the shadow is
    centered opposite to the Sun's Right Ascension at midnight.
    Parallax moves it westward (decreasing RA) by
    about 2 d/h = 8 m/h, less in the evening and morning.
    At the equinox, look about 10 degrees right (or left)
    of that point, less in the weeks before and after.
    
    The method that brought me instant success after a number of failures
    was to shoot with a digital camera (simple, 400 ISO, f/2.5, <3x zoom,
    60 s, fixed on a tripod), and immediately viewing the image(s).
    This showed me where the flaring ones were. I got up to fifteen in one 
    image.
    
    (Excel and image in http://www.algonet.se/~b_gimle/geoflare.htm)
    
    /Björn
    
    ----- Original Message ----- 
    
    and then just scan the declination they are at as
    seen from your location (maybe around -6?).
    Mounted 15x binoculars would be great for seeing
    a lot of them.  With a telescope, use your lowest
    power eyepiece to start with, or the one with the
    widest field of view, if you have a wide-angle.
    
    
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