Re: Decay watch: Iridium 19 Delta 2 rocket

Alan Pickup (alan@wingar.demon.co.uk)
Fri, 17 Apr 1998 17:58:07 +0100

With only a few hours to re-entry, the latest elset for this ...

Iridm 19 Delta r 5.9  2.4  0.0  5.6 d            182 x 149 km
1 24970U 97056F   98107.54350511  .09013226 -13851-5  40360-3 0  2804
2 24970  83.5815 263.5897 0025466 274.5216  85.3189 16.40129006 31786

... has it 11 seconds early against the "9276" SatEvo evolution I posted
yesterday.

My prediction for decay remains at April 17.94 (22:30 UTC +-2h).

Predicted elsets:
Iridm 19 Delta r 5.9  2.4  0.0  5.6 d            171 x 144 km
1 24970U 97056F   98107.66540018  .13195333  12680+0  37071-3 0 92801
2 24970  83.5806 263.4653 0021147 274.0002  85.7581 16.43209257 31808
Iridm 19 Delta r 5.9  2.4  0.0  5.6 d            165 x 141 km
1 24970U 97056F   98107.72627408  .16035411  19846+0  34973-3 0 92809
2 24970  83.5800 263.4030 0018619 273.7390  86.0481 16.44975661 31811
Iridm 19 Delta r 5.9  2.4  0.0  5.6 d            157 x 137 km
1 24970U 97056F   98107.78707597  .20837683  36233+0  33290-3 0 92809
2 24970  83.5792 263.3406 0015691 273.4773  86.3430 16.47187993 31820
Iridm 19 Delta r 5.9  2.4  0.0  5.6 d            147 x 131 km
1 24970U 97056F   98107.84778407  .31122711  91019+0  32725-3 0 92800
2 24970  83.5782 263.2780 0012080 273.2151  86.6467 16.50245360 31831
Iridm 19 Delta r 5.9  2.4  0.0  5.6 d            128 x 120 km
1 24970U 97056F   98107.90834811  .76680409  70735+1  39159-3 0 92802
2 24970  83.5766 263.2153 0006756 272.9521  86.9706 16.55829023 31846

The final rev takes it northbound across the equator south of the Bay of
Bengal at 21:48 UTC, northwards over Tibet and Siberia, then southwards
across the NW Territories of Canada (~22:15), Saskatchewan (22:18),
almost over Denver, Colorado, (22:22), W of Mexico City at 22:26, then
across the W Pacific towards Antarctica.

Alan
-- 
 Alan Pickup | COSPAR site 2707:   55d53m48.7s N   3d11m51.2s W    156m asl
 Edinburgh   | Home:      alan@wingar.demon.co.uk       +44 (0)131 477 9144
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