More Flaring Geosats

Jason Hatton (
Sat, 9 Oct 1999 13:35:15 +0200 (MET DST)

Hi Everyone,
		I finally found the time & a clear sky to try observing
some operational
geosats coming out of eclipse (shadow exit)  this evening. Unfortunately,
the sky was rather hazy in the southeast where I have clearest view of the
geosynchronous "belt". Therefore, I decided to use my 6" telescope at x73
magnification which only gave a 0.7deg field of view. Nevertheless I did
manage to observe two geosync. satellites. I targetted Inmarsat 3-F1 (23839
/ 96-020A) first which became visible at 19:58UT 08-Oct-99, at a steady mag
+9. In the same field of view to the southeast Intelsat 804 (2511O /
97-083A) was also visible at a similar magnitude to Inmarsat 3-F1. Both
satellites appeared motionless, as stars swept across the field of view.
Over the next 20 minutes both satellites gradually faded in brightness down
to the limiting magnitude of the scope which was probably around mag +11
with the haze & light pollution.

	I came across a nice animation (animated *gif files) of several
geostationary satellites entering & emerging eclipse taken by a driftscan
CCD camera. Some satellites can be clearly seen to flare at shadow exit.

Best wishes & clear skies,


43.692N, 7.246E,30M

Dr Jason Hatton
Hopital de l'Archet
Rte St. Antoine de Ginestiere
BP 79, 06202 Nice Cedex 03


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