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 Jan 08 18:56 | 2026 Jan 06 03:22:29 | 28.2400 | 0.21282 | 0.7476 | 304.0592 | 37.5411 | 9.37486 | 3.243 |
| 2026 Jan 07 18:57 | 2026 Jan 06 03:22:29 | 28.2400 | 0.21282 | 0.7476 | 304.0592 | 37.5411 | 9.37486 | 3.243 |
| 2026 Jan 06 18:56 | 2026 Jan 06 03:22:29 | 28.2400 | 0.21282 | 0.7476 | 304.0592 | 37.5411 | 9.37486 | 3.243 |
| 2026 Jan 05 18:57 | 2025 Dec 31 11:49:04 | 28.2421 | 0.21281 | 1.6474 | 281.9814 | 37.5411 | 9.37486 | 3.243 |
| 2026 Jan 04 18:56 | 2025 Dec 31 11:49:04 | 28.2421 | 0.21281 | 1.6474 | 281.9814 | 37.5411 | 9.37486 | 3.243 |
| 2026 Jan 03 18:57 | 2025 Dec 31 11:49:04 | 28.2421 | 0.21281 | 1.6474 | 281.9814 | 37.5411 | 9.37486 | 3.243 |
| 2026 Jan 01 18:56 | 2025 Dec 31 11:49:04 | 28.2421 | 0.21281 | 1.6474 | 281.9814 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 31 18:57 | 2025 Dec 31 11:49:04 | 28.2421 | 0.21281 | 1.6474 | 281.9814 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 30 18:56 | 2025 Dec 26 11:37:26 | 28.2411 | 0.21279 | 2.4452 | 262.4083 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 29 18:56 | 2025 Dec 26 11:37:26 | 28.2411 | 0.21279 | 2.4452 | 262.4083 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 28 18:57 | 2025 Dec 26 11:37:26 | 28.2411 | 0.21279 | 2.4452 | 262.4083 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 27 18:57 | 2025 Dec 26 11:37:26 | 28.2411 | 0.21279 | 2.4452 | 262.4083 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 26 18:56 | 2025 Dec 26 11:37:26 | 28.2411 | 0.21279 | 2.4452 | 262.4083 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 25 18:57 | 2025 Dec 20 12:26:26 | 28.2376 | 0.21277 | 3.3956 | 239.0884 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 24 18:56 | 2025 Dec 20 12:26:26 | 28.2376 | 0.21277 | 3.3956 | 239.0884 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 23 18:56 | 2025 Dec 20 12:26:26 | 28.2376 | 0.21277 | 3.3956 | 239.0884 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 22 18:57 | 2025 Dec 20 12:26:26 | 28.2376 | 0.21277 | 3.3956 | 239.0884 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 21 18:57 | 2025 Dec 20 12:26:26 | 28.2376 | 0.21277 | 3.3956 | 239.0884 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 20 18:57 | 2025 Dec 20 12:26:26 | 28.2376 | 0.21277 | 3.3956 | 239.0884 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 19 18:57 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 18 18:57 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 17 18:58 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 16 18:57 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 15 18:58 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 14 18:56 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 13 18:56 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |
| 2025 Dec 12 18:57 | 2025 Dec 11 23:56:50 | 28.2299 | 0.21273 | 4.7534 | 205.7731 | 37.5411 | 9.37486 | 3.243 |