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 |
| 2025 Sep 18 17:56 | 2025 Sep 15 04:51:57 | 28.2305 | 0.21281 | 18.7527 | 222.3911 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 15 17:56 | 2025 Sep 15 04:51:57 | 28.2305 | 0.21281 | 18.7527 | 222.3911 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 12 17:57 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 11 17:57 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 10 17:56 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 08 17:57 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 07 17:56 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 06 20:41 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 03 17:57 | 2025 Sep 03 04:03:50 | 28.2261 | 0.21282 | 20.6715 | 175.3277 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 02 17:56 | 2025 Aug 27 21:16:38 | 28.2255 | 0.21283 | 21.6735 | 150.7532 | 119.1202 | 9.37483 | 3.243 |
| 2025 Sep 01 17:56 | 2025 Aug 27 21:16:38 | 28.2255 | 0.21283 | 21.6735 | 150.7532 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 31 17:56 | 2025 Aug 27 21:16:38 | 28.2255 | 0.21283 | 21.6735 | 150.7532 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 30 17:56 | 2025 Aug 27 21:16:38 | 28.2255 | 0.21283 | 21.6735 | 150.7532 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 29 17:56 | 2025 Aug 27 21:16:38 | 28.2255 | 0.21283 | 21.6735 | 150.7532 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 28 17:57 | 2025 Aug 27 21:16:38 | 28.2255 | 0.21283 | 21.6735 | 150.7532 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 27 17:56 | 2025 Aug 21 06:47:44 | 28.2262 | 0.21286 | 22.7264 | 124.9299 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 26 17:56 | 2025 Aug 21 06:47:44 | 28.2262 | 0.21286 | 22.7264 | 124.9299 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 25 17:56 | 2025 Aug 21 06:47:44 | 28.2262 | 0.21286 | 22.7264 | 124.9299 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 24 17:56 | 2025 Aug 21 06:47:44 | 28.2262 | 0.21286 | 22.7264 | 124.9299 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 23 17:56 | 2025 Aug 21 06:47:44 | 28.2262 | 0.21286 | 22.7264 | 124.9299 | 119.1202 | 9.37483 | 3.243 |
| 2025 Aug 22 17:56 | 2025 Aug 17 15:52:12 | 28.2267 | 0.21289 | 23.3040 | 110.7652 | 119.1202 | 9.37483 | 3.243 |