Re: HST close approaches
Alan Pickup (alan@wingar.demon.co.uk)
Sat, 22 Mar 1997 08:04:41 +0000
Regarding close approaches between the HST and other objects, ROB MATSON
<ROBERT.D.MATSON@cpmx.saic.com> writes
>I came up with some interesting "near-hits". Times and dates are
>Pacific Standard Time (UT - 8 hrs):
>
> Pacific
> Date Local Time Norad Name Range (km) EphAge
>---------- ---------- ----- -------------- ---------- ------
> 3/18/1997 17:13:43.0 3699 68091AN 1.2 +5.67
> 3/22/1997 6:12:43.0 10493 77065ES 1.2 +9.60
> 3/24/1997 4:41:59.2 15889 Cosmos 1666 2.9 +10.41
> 3/23/1997 15:43:03.5 16111 Cosmos 1689 Rk 1.5 +9.44
> 3/23/1997 4:24:49.6 24391 94029QU 0.6 +9.17
> 3/23/1997 14:07:23.2 24568 94029XU 9.0 +10.30
>
>The last two objects are part of the Pegasus debris storm. If some one has
>more recent element sets for any of these objects, it might be interesting to
>see how much the minimum range changes. I used the ALLSAT.DAT file for
>3/15/97. --Rob
Here, still warm off OIG BBS server, are the latest two (at least)
elsets for each of these:
Cosmos 249 deb AN 1390 x 514 km
1 03699U 68091AN 97079.25045169 .00000580 00000-0 16255-3 0 5097
2 03699 62.3203 121.0970 0597259 119.2935 246.9175 13.83336486318665
Cosmos 249 deb AN 1390 x 514 km
1 03699U 68091AN 97080.19016018 .00000580 00000-0 16255-3 0 5026
2 03699 62.3203 118.4066 0597254 119.5172 246.6788 13.83337876318797
Delta 1 deb ES 1329 x 600 km
1 10493U 77065ES 97079.08574628 -.00000160 00000-0 00000-0 0 1130
2 10493 29.7276 332.5132 0496673 214.3344 142.4232 13.79897758850417
Delta 1 deb ES 1329 x 600 km
1 10493U 77065ES 97080.09844482 -.00000036 00000-0 00000-0 0 1076
2 10493 29.7275 327.1159 0496442 222.9295 133.1521 13.79898385850559
Cosmos 1666 623 x 596 km
1 15889U 85058A 97079.11427531 .00000278 00000-0 28772-4 0 4669
2 15889 82.5246 290.8691 0019773 314.0859 45.8729 14.86283170632244
Cosmos 1666 623 x 596 km
1 15889U 85058A 97080.12412792 .00000252 00000-0 25809-4 0 4733
2 15889 82.5247 289.9198 0019748 310.7573 49.1928 14.86283453632392
Cosmos 1689 SL-3 r 620 x 550 km
1 16111U 85090B 97080.04589242 .00000804 00000-0 78270-4 0 2027
2 16111 97.4899 86.4328 0050890 132.4852 228.0687 14.94196929622711
Cosmos 1689 SL-3 r 620 x 549 km
1 16111U 85090B 97080.58163222 .00000883 00000-0 85456-4 0 1909
2 16111 97.4899 86.9436 0051008 130.6655 229.9016 14.94198477622793
Pegasus deb QU 617 x 508 km
1 24391U 94029QU 97079.94987863 .00177066 00000-0 12540-1 0 2194
2 24391 81.9504 269.5710 0078789 36.2396 324.3645 15.01491888 41003
Pegasus deb QU 617 x 507 km
1 24391U 94029QU 97080.48298334 .00153801 00000-0 10887-1 0 2208
2 24391 81.9516 269.0221 0079340 32.2554 328.0469 15.01585930 41089
Pegasus deb XU 631 x 492 km
1 24568U 94029XU 97078.82781155 .00209158 00000-0 14067-1 0 1599
2 24568 82.0512 277.3569 0099701 53.8179 307.1936 15.01794878 39622
Pegasus deb XU 633 x 489 km
1 24568U 94029XU 97079.49408345 .00185374 00000-0 12606-1 0 1602
2 24568 82.0521 276.6885 0103431 52.0653 309.0450 15.02002415 39946
Pegasus deb XU 631 x 490 km
1 24568U 94029XU 97079.49403385 .00200300 00000-0 13344-1 0 1619
2 24568 82.0534 276.6883 0101556 50.6410 310.2550 15.02032541 39723
Predictions for the two high-drag Pegasus debris objects will be the
least certain - I expect both to decay by mid-May.
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
Scotland | Royal Observatory: A.Pickup@roe.ac.uk +44 (0)131 668 8224