[amsat-bb] AO-10 keps / Eclipse

[w4sm@xxxxxxxxxx (Stacey Mills)]

As many of you know, AO-10 is functioning rather well these days with the
exception of the long-standing QSB problem.  Here are some updated keps
based on recent ranging data:

Satellite: AO-10
Catalog number: 14129
Epoch time:      98334.41402
Inclination:        26.8570 deg
RA of node:         56.2190 deg
Eccentricity:     0.59993
Arg of perigee:    269.7500 deg
Mean anomaly:      218.2590 deg
Mean motion:     2.05837914 rev/day
Decay rate:         0.00    rev/day^2

------------------------------------------------------------------------------
Also note that the satellite is in darkness after perigee on every orbit.
The following are eclipse/darkness times (UTC) for the next 10 days:

            AO-10 EARTH-SOLAR ECLIPSE PROJECTION / W4SM
               Ephemeris Dated:  1998   Nov   30 [Mon]

                          Entry      Exit     DUR    IN   OUT
       DATE             HH:MM:SS   HH:MM:SS   min    MA   MA
--------------------------------------------------------------------
 1998   Nov   30 [Mon]  03:44:42   04:16:34    32    019  031
 1998   Nov   30 [Mon]  15:24:41   15:57:09    32    019  031
 1998   Dec   01 [Tue]  03:04:40   03:37:44    33    019  032
 1998   Dec   01 [Tue]  14:44:39   15:18:20    34    020  032
 1998   Dec   02 [Wed]  02:24:39   02:58:57    34    020  032
 1998   Dec   02 [Wed]  14:04:39   14:39:34    35    020  033
 1998   Dec   03 [Thu]  01:44:39   02:20:12    36    020  033
 1998   Dec   03 [Thu]  13:24:39   14:00:50    36    020  033
 1998   Dec   04 [Fri]  01:04:40   01:41:29    37    020  034
 1998   Dec   04 [Fri]  12:44:40   13:22:09    37    021  034
 1998   Dec   05 [Sat]  00:24:42   01:02:49    38    021  035
 1998   Dec   05 [Sat]  12:04:43   12:43:30    39    021  035
 1998   Dec   05 [Sat]  23:44:45   00:24:12    39    021  035
 1998   Dec   06 [Sun]  11:24:47   12:04:54    40    021  036
 1998   Dec   06 [Sun]  23:04:49   23:45:37    41    021  036
 1998   Dec   07 [Mon]  10:44:52   11:26:20    41    022  037
 1998   Dec   07 [Mon]  22:24:55   23:07:04    42    022  037
 1998   Dec   08 [Tue]  10:04:58   10:47:49    43    022  038
 1998   Dec   08 [Tue]  21:45:01   22:28:34    44    022  038
 1998   Dec   09 [Wed]  09:25:05   10:09:20    44    022  038
 1998   Dec   09 [Wed]  21:05:10   21:50:06    45    022  039
 1998   Dec   10 [Thu]  08:45:14   09:30:53    46    023  039
 1998   Dec   10 [Thu]  20:25:20   21:11:41    46    023  040

----------------------------------------------------------------------------
------
Finally, note that perigee is now at the lowest point of orbital latitude
(ArgP = 270).  This gives the satellite track on a "rectangular" (Mercator)
map projection a distinctly symmetrical pattern.

Enjoy!


--  
 __________________________________________________________________________  
  Stacey E. Mills, W4SM    WWW: 	http://www.cstone.net/~w4sm/ham1.html 
   Charlottesville, VA	   PGP key:	http://www.cstone.net/~w4sm/key.asc    	
 __________________________________________________________________________


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