obs. IRIDIUM 12

jean monseur (jmonseur@mail.cpod.fr)
Thu, 30 Oct 1997 10:00:14 +0100

Good morning to all,
In case a world program would collect all Iridiums observations, including
non american :
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Prediction  IRIDFLAR  ( Rob. Matson )
Latitude:  49.18570  Longitude:   -0.37810  Altitude:   30.0 m
Time Zone: UTC  +1.0 h
Ir   Date      Time     Azim Elev   RA   Decl  Range  N Ill SunAng FlrAng Mag
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12 97-10-30  5:53:39.0 359.9 39.9 19h28  80.7  1137.3 A Lit -18.2   5.00  2.2
12 97-10-30  5:54: 7.6   0.8 33.0 19h18  73.7  1289.8 A Lit -18.1   0.16 -5.2
12 97-10-30  5:54:45.0   1.6 25.8 19h13  66.5  1506.0 A Lit -18.0   4.61  2.7
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with Orbital  Elements
Iridium 12
1 24837U 97030B   97299.98367818 -.00000125 +00000-0 -51755-4 0 01022
2 24837 086.3970 107.5432 0005866 083.0412 277.1452 14.34207602018808
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Naked eye observation  Local time UTC +1
Loc:  GPS  Lat. N.: 49d 11' 8.65"   Long.W. : 0d 22' 41.2"    Alt.: 30 m

clear sky; city light pollution +++
Sun:  -9 deg  (US Naval Observatory)
Observation accords with predictions , within the limits of visual observation.
Predicted intensity of mag  -5.2  does not seem  overestimated.
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Question: are certain meridians favoured  for Iridiums observation ?
jmonseur@mail.cpod.fr
GPS  Latitude Nord : 49d 11' 8.65" 
         Longitude Ouest : 0d 22' 41.2" 
Altitude : 30 m