observations of geosync satellites

From: Rainer Kracht <R.KRACHT_at_ABBS.heide.de>
Date: Tue, 7 Mar 1995 16:50:43 -0500
 Observations of geosync satellites

                     UTC           mag
92- 41 B 95-03-06 22:02:36   RK   +10.5
92- 41 B 95-03-06 22:34:36   RK   +10
92- 41 B 95-03-06 23:15:00   RK   +7.5  before eclipse
94- 41 B 95-03-07 00:10      RK  >10.5  eclipse
94- 41 B 95-03-07 00:10:42   RK   +10
94- 41 B 95-03-07 00:14:40   RK   +10

  RK : Rainer Kracht,  long. 9.6626 (east), lat. 53.7695 (north),   9 m


 Notes: From my geographical latitude the declination of the observed
 geosats was -7.9 to -7.4 deg (2000.0). The declination of the Sun was
 -7.5 (Mar 01) to -5.5 deg (Mar 07). If both declinations are nearly the
 same, one can see specular reflections from surfaces which are aligned
 parallel to the Earth's axis. Spin stabilised satellites (of cylindrical
 shape) have their spin axis (and their outer surface) parallel to the
 Earth's axis.

  Shape of observed satellites:
  90- 21 A  Intelsat 6 F3  Cylinder
  90- 74 A  Marcopolo 2    Cylinder
  90- 79 B  Eutelsat 2 F1  Box + panels
  91-  3 A  Italsat 1      Box + panels
  91- 15 B  Meteosat 5     Cylinder
  91- 55 A  Intelsat 6 F5  Cylinder
  91- 75 A  Intelsat 6 F1  Cylinder
  91- 84 A  Telecom 2A     Box + panels
  92- 41 B  Eutelsat 2 F4  Box + panels
  92- 66 A  DFS 3          Box + panels
  93- 62 D  Raduga 30 R    Cylinder (not stabilised)
  93- 73 B  Meteosat 6     Cylinder
  94- 34 A  Intelsat 702   Box + panels

  About half of the observed satellites are not cylindrical in shape, three
  of them (90-79B, 91-3A, 92-41B) brightened considerably some minutes
  before entering the shadow of the Earth. 91-84A remained steady before
  eclipse, 90-21A grew invisible about 20 minutes before eclipse.
Received on Thu Mar 09 1995 - 19:07:17 UTC

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