Orbital elements of USA 143
| Launched | 29 April 1999 |
| Flight ended | – |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 25724 |
| Alternative names |
MILSTAR-2 1 |
| Date fetched |
Epoch osculation |
Inc. [°] |
Ecc. | RA asc node [hr] |
Arg Peri. [°] |
Mean anom [°] |
Mean motion [rev/day] |
Abs. mag |
| Date fetched |
Epoch osculation |
Inc. [°] |
Ecc. | RA asc node [hr] |
Arg Peri. [°] |
Mean anom [°] |
Mean motion [rev/day] |
Abs. mag |
| 2026 May 24 17:57 | 2026 May 21 00:53:33 | 28.2247 | 0.21319 | 3.2325 | 111.6234 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 23 17:58 | 2026 May 21 00:53:33 | 28.2247 | 0.21319 | 3.2325 | 111.6234 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 22 17:57 | 2026 May 21 00:53:33 | 28.2247 | 0.21319 | 3.2325 | 111.6234 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 21 17:57 | 2026 May 21 00:53:33 | 28.2247 | 0.21319 | 3.2325 | 111.6234 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 20 17:57 | 2026 May 16 10:56:40 | 28.2233 | 0.21318 | 3.9632 | 93.7100 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 19 17:58 | 2026 May 16 10:56:40 | 28.2233 | 0.21318 | 3.9632 | 93.7100 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 18 17:57 | 2026 May 16 10:56:40 | 28.2233 | 0.21318 | 3.9632 | 93.7100 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 17 17:57 | 2026 May 16 10:56:40 | 28.2233 | 0.21318 | 3.9632 | 93.7100 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 16 17:56 | 2026 May 16 10:56:40 | 28.2233 | 0.21318 | 3.9632 | 93.7100 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 15 17:57 | 2026 May 10 11:43:55 | 28.2212 | 0.21317 | 4.9150 | 70.3765 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 14 17:58 | 2026 May 10 11:43:55 | 28.2212 | 0.21317 | 4.9150 | 70.3765 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 13 17:58 | 2026 May 10 11:43:55 | 28.2212 | 0.21317 | 4.9150 | 70.3765 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 12 17:58 | 2026 May 10 11:43:55 | 28.2212 | 0.21317 | 4.9150 | 70.3765 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 11 17:56 | 2026 May 10 11:43:55 | 28.2212 | 0.21317 | 4.9150 | 70.3765 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 10 17:57 | 2026 May 10 11:43:55 | 28.2212 | 0.21317 | 4.9150 | 70.3765 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 09 17:57 | 2026 May 05 08:57:42 | 28.2195 | 0.21315 | 5.7311 | 50.3683 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 08 17:57 | 2026 May 05 08:57:42 | 28.2195 | 0.21315 | 5.7311 | 50.3683 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 07 17:58 | 2026 May 05 08:57:42 | 28.2195 | 0.21315 | 5.7311 | 50.3683 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 06 17:57 | 2026 May 05 08:57:42 | 28.2195 | 0.21315 | 5.7311 | 50.3683 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 05 17:57 | 2026 May 05 08:57:42 | 28.2195 | 0.21315 | 5.7311 | 50.3683 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 04 17:57 | 2026 Apr 30 08:44:19 | 28.2189 | 0.21314 | 6.5304 | 30.7720 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 03 17:57 | 2026 Apr 30 08:44:19 | 28.2189 | 0.21314 | 6.5304 | 30.7720 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 02 17:57 | 2026 Apr 30 08:44:19 | 28.2189 | 0.21314 | 6.5304 | 30.7720 | 272.3856 | 9.37509 | 3.243 |
| 2026 May 01 17:56 | 2026 Apr 30 08:44:19 | 28.2189 | 0.21314 | 6.5304 | 30.7720 | 272.3856 | 9.37509 | 3.243 |
| 2026 Apr 30 17:56 | 2026 Apr 30 08:44:19 | 28.2189 | 0.21314 | 6.5304 | 30.7720 | 272.3856 | 9.37509 | 3.243 |
| 2026 Apr 29 17:57 | 2026 Apr 24 06:55:44 | 28.2192 | 0.21315 | 7.4999 | 7.0013 | 272.3856 | 9.37509 | 3.243 |
| 2026 Apr 28 17:56 | 2026 Apr 24 06:55:44 | 28.2192 | 0.21315 | 7.4999 | 7.0013 | 272.3856 | 9.37509 | 3.243 |
| 2026 Apr 27 17:58 | 2026 Apr 24 06:55:44 | 28.2192 | 0.21315 | 7.4999 | 7.0013 | 272.3856 | 9.37509 | 3.243 |