Orbital elements of USA 31
| Launched | 1 September 1988 |
| Flight ended | – |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 19458 |
| 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 Dec 06 18:56 | 2025 Dec 01 16:18:27 | 27.2759 | 0.72905 | 4.4656 | 87.6364 | 346.0056 | 2.00865 | – |
| 2025 Dec 05 18:57 | 2025 Dec 01 16:18:27 | 27.2759 | 0.72905 | 4.4656 | 87.6364 | 346.0056 | 2.00865 | – |
| 2025 Dec 04 18:57 | 2025 Dec 01 16:18:27 | 27.2759 | 0.72905 | 4.4656 | 87.6364 | 346.0056 | 2.00865 | – |
| 2025 Dec 03 18:56 | 2025 Dec 01 16:18:27 | 27.2759 | 0.72905 | 4.4656 | 87.6364 | 346.0056 | 2.00865 | – |
| 2025 Dec 02 18:56 | 2025 Dec 01 16:18:27 | 27.2759 | 0.72905 | 4.4656 | 87.6364 | 346.0056 | 2.00865 | – |
| 2025 Nov 30 18:57 | 2025 Nov 25 05:00:33 | 27.2766 | 0.72893 | 4.5869 | 84.6482 | 346.0056 | 2.00865 | – |
| 2025 Nov 29 18:56 | 2025 Nov 25 05:00:33 | 27.2766 | 0.72893 | 4.5869 | 84.6482 | 346.0056 | 2.00865 | – |
| 2025 Nov 28 18:57 | 2025 Nov 25 05:00:33 | 27.2766 | 0.72893 | 4.5869 | 84.6482 | 346.0056 | 2.00865 | – |
| 2025 Nov 27 18:57 | 2025 Nov 25 05:00:33 | 27.2766 | 0.72893 | 4.5869 | 84.6482 | 346.0056 | 2.00865 | – |
| 2025 Nov 26 18:57 | 2025 Nov 25 05:00:33 | 27.2766 | 0.72893 | 4.5869 | 84.6482 | 346.0056 | 2.00865 | – |
| 2025 Nov 25 18:57 | 2025 Nov 25 05:00:33 | 27.2766 | 0.72893 | 4.5869 | 84.6482 | 346.0056 | 2.00865 | – |
| 2025 Nov 24 18:56 | 2025 Nov 19 17:36:22 | 27.2785 | 0.72882 | 4.6891 | 82.1270 | 346.0056 | 2.00865 | – |
| 2025 Nov 23 18:57 | 2025 Nov 19 17:36:22 | 27.2785 | 0.72882 | 4.6891 | 82.1270 | 346.0056 | 2.00865 | – |
| 2025 Nov 21 18:57 | 2025 Nov 19 17:36:22 | 27.2785 | 0.72882 | 4.6891 | 82.1270 | 346.0056 | 2.00865 | – |
| 2025 Nov 20 18:56 | 2025 Nov 19 17:36:22 | 27.2785 | 0.72882 | 4.6891 | 82.1270 | 346.0056 | 2.00865 | – |
| 2025 Nov 18 18:57 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 16 18:58 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 15 18:57 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 13 18:56 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 12 18:57 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 11 18:55 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 10 18:57 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |
| 2025 Nov 09 18:57 | 2025 Nov 07 18:54:53 | 27.2830 | 0.72867 | 4.9112 | 76.6405 | 346.0056 | 2.00865 | – |