At 10:54 PM 17/03/2008, amstuart wrote: >Hi: > >I was imaging last evening north of NGC 1981. I >am at 25.6554°N, 80.3503°W, imaging >20:04:11 to 20:10:01 EST on 3-16-08. I apologize >that my graphics stink on YouTube (haven't quite >mastered the 640 x 480 standard when making >"slides"), but multiple geostationary satellite >passes are shown (purple lines) transiting >west-to-east at the time I was imaging. > >http://uk.youtube.com/watch?v=gZDpxeeEWPY > >My question is simply this: how can all of these >satellites, whichever one I captured, be moving >across my FOV? I thought this type of satellite >appeared to be hovering over one location? >Software Bisque's TheSky planetarium software >even shows the geostationary satellites moving via an animation in real time. > >Each of my CCD images were 10 seconds in >duration, and I assembled an .avi clip to >document the 6 minute transit over my 64 arc-minute FOV. Adam. you were tracking the stars. Geostationary satellites are stationary with respect to the Earth's surface. If you turned off your drive, the geosat would register as a point, and the stars as trails. Another new member of this group( Patrick wiggins) just posted a couple of images taken this way see: http://gallery.utahastronomy.com/main.php?g2_itemId=10620 Tony Beresford ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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