David Bishop's obs of July 16, 1991

From: Mike McCants <mike_at_comshare.com>
Date: Mon, 1 May 1995 12:09:10 -0400
>From my message to David on Feb. 26, 1992:   :-)

>>So, I haven't taken time to see whether or not I might be able to
>>match your observation with a specific object.  I expect to get
>>around to this "one of these days".

I compute that the Cosmos 2100 rocket went near your zenith.

The object "Spot 1" appears to be a much better candidate:

Ted's file of 91/07/13:
1 16613U 86019  A 91193.14231257 -.00000106  00000-0 -41034-4 0  3796
2 16613  98.6965 266.6727 0001802 122.1925 237.8866 14.20069262119273
Ted's file of 91/07/20:
1 16613U 86019  A 91199.69527776 -.00003985  00000-0 -18754-2 0  3841
2 16613  98.6907 273.1056 0002135 118.1354 242.0005 14.20017033120205

Note that five element sets were issued in a 6 day period, the mean motion
is lower and the drag term is negative.

Some time prior to 91199, Spot 1 manuevered into a slightly higher orbit.
91/199 is July 18.

Predictions for July 16 for David using 91199 elset:

16613 Spot 1         4.7 1.8 1.8  RadarCrossSection=24
 H  M  S  Al  Az  Dir  Mag Dys F  Hgt  Rng Phs
 9 58  6  20 109  298  5.5  -2 8  518 1134  26
 9 58 56  25  99  291  5.1  -2 8  518 1013  36
 9 59 47  29  85  282  5.0  -2 8  518  929  49
10  0 37  30  68C 272  5.0  -2 8  518  894  64
10  1 28  29  51  260  5.3  -2 8  518  913  79
10  2 18  26  36  251  5.7  -2 8  518  984  93
10  2 43  24  30  247  5.9  -2 8  518 1035  99

So, my guess is that the cloud around it was due to RCS jet firings.

Mike
Received on Mon May 01 1995 - 13:15:09 UTC

This archive was generated by hypermail 2.2.0 : Fri Mar 07 2014 - 00:14:29 UTC