I've had a request to post my predictions for some of the decaying objects from the recent launch of Iridiums 51 & 61 by a Long March rocket. Here are the latest elsets for these: Ir 51 CZ-2C r 10.0 3.0 0.0 3.0 d 633 x 177 km 1 25264U 98018C 98087.91130071 .00793668 -13956-5 67452-3 0 143 2 25264 86.3854 12.1521 0336364 159.8538 201.6386 15.54098982 491 Ir 51 CS02 S/D 610 x 196 km 1 25265U 98018D 98087.90732351 .00377969 -13936-5 56462-3 0 84 2 25265 86.3097 12.1324 0305247 148.7341 213.2482 15.54693442 462 Ir 51 CSL02 deb 433 x 161 km 1 25266U 98018E 98087.58262930 .19967842 -37149-5 71821-2 0 105 2 25266 86.6720 12.3679 0203954 162.2780 198.5828 15.91870589 441 Ir 51 CSL02 deb 630 x 171 km 1 25267U 98018F 98086.96592197 .08468522 -20605-5 59208-2 0 88 2 25267 86.0966 12.6113 0338528 160.2705 207.1730 15.55561280 348 Ir 51 CSL02 deb 507 x 173 km 1 25268U 98018G 98087.79807401 .14391538 -25051-5 92690-2 0 102 2 25268 86.0969 12.2066 0248484 152.3161 209.1613 15.76506955 471 Ir 51 CZ r deb 772 x 208 km 1 25269U 98018H 98085.27749600 .03580344 -15218-5 86986-2 0 29 2 25269 86.5061 13.9314 0410951 167.9533 193.1928 15.25331428 82 Does anyone know what CS02 S/D and CSL02 are? #25264, the rocket, is predicted to decay about April 23. #25265, CS02 S/D, may decay around mid-May. #25266 may have decayed at about 04:00 UTC this morning, March 29. My final predicted elsets: Ir 51 CSL02 Deb 248 x 159 km 1 25266U 98018E 98088.08101968 .71917350 21755+1 12820-1 0 90079 2 25266 86.6634 12.1109 0067669 158.3600 201.9273 16.25877092 525 Ir 51 CSL02 Deb 185 x 145 km 1 25266U 98018E 98088.14232503 2.52659090 41277+2 90730-2 0 90070 2 25266 86.6594 12.0787 0030710 158.0889 202.0427 16.40405449 538 #25267 is probably decaying today, nominally at about 20.00 UTC but with an uncertainty of 10 hours or more because of the age of the latest elset. For what it's worth, my prediction ends: Ir 51 CSL02 Deb 275 x 165 km 1 25267U 98018F 98088.73733356 .51771502 83848+0 13385-1 0 90043 2 25267 86.0599 11.6206 0083255 152.5207 207.9219 16.19754084 625 Ir 51 CSL02 Deb 238 x 160 km 1 25267U 98018F 98088.79895830 .81449131 30232+1 14083-1 0 90044 2 25267 86.0574 11.5829 0059560 152.2532 208.0657 16.27577227 638 #25268 is predicted to decay at about 19:50 UTC today. My final predicted elsets: Ir 51 CSL02 Deb 244 x 159 km 1 25268U 98018G 98088.73848043 .76430158 23414+1 13109-1 0 90060 2 25268 86.0843 11.6277 0064898 150.1458 210.2259 16.26616609 629 Ir 51 CSL02 Deb 171 x 139 km 1 25268U 98018G 98088.79971821 3.63794273 50000+2 81465-2 0 90060 2 25268 86.0808 11.5899 0024131 149.8762 210.2625 16.44062108 635 #25269 has only two published elsets and nothing recent. The higher perigee and lower drag implied by its latest elset suggest it might last until April 2. 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 | SatEvo satellite page: http://www.wingar.demon.co.uk/satevo/