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 May 08 17:56 | 2025 May 03 03:41:42 | 26.9518 | 0.73109 | 8.4197 | 349.3151 | 1.0495 | 2.00904 | – |
| 2025 May 07 17:56 | 2025 May 03 03:41:42 | 26.9518 | 0.73109 | 8.4197 | 349.3151 | 1.0495 | 2.00904 | – |
| 2025 May 06 17:57 | 2025 May 03 03:41:42 | 26.9518 | 0.73109 | 8.4197 | 349.3151 | 1.0495 | 2.00904 | – |
| 2025 May 05 17:56 | 2025 May 03 03:41:42 | 26.9518 | 0.73109 | 8.4197 | 349.3151 | 1.0495 | 2.00904 | – |
| 2025 May 04 17:57 | 2025 May 03 03:41:42 | 26.9518 | 0.73109 | 8.4197 | 349.3151 | 1.0495 | 2.00904 | – |
| 2025 May 03 17:57 | 2025 May 03 03:41:42 | 26.9518 | 0.73109 | 8.4197 | 349.3151 | 1.0495 | 2.00904 | – |
| 2025 May 01 17:56 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 30 17:56 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 29 17:57 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 27 17:56 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 26 17:57 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 25 17:56 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 24 17:56 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 23 17:57 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 22 17:56 | 2025 Apr 22 04:54:11 | 26.8906 | 0.73149 | 8.6256 | 344.1864 | 1.0495 | 2.00904 | – |
| 2025 Apr 21 17:57 | 2025 Apr 15 05:40:07 | 26.8522 | 0.73176 | 8.7573 | 340.9152 | 1.0495 | 2.00904 | – |
| 2025 Apr 20 17:56 | 2025 Apr 15 05:40:07 | 26.8522 | 0.73176 | 8.7573 | 340.9152 | 1.0495 | 2.00904 | – |
| 2025 Apr 19 17:56 | 2025 Apr 15 05:40:07 | 26.8522 | 0.73176 | 8.7573 | 340.9152 | 1.0495 | 2.00904 | – |
| 2025 Apr 18 17:57 | 2025 Apr 15 05:40:07 | 26.8522 | 0.73176 | 8.7573 | 340.9152 | 1.0495 | 2.00904 | – |
| 2025 Apr 17 17:56 | 2025 Apr 15 05:40:07 | 26.8522 | 0.73176 | 8.7573 | 340.9152 | 1.0495 | 2.00904 | – |
| 2025 Apr 16 17:57 | 2025 Apr 15 05:40:07 | 26.8522 | 0.73176 | 8.7573 | 340.9152 | 1.0495 | 2.00904 | – |
| 2025 Apr 15 17:56 | 2025 Apr 10 06:12:58 | 26.8264 | 0.73193 | 8.8514 | 338.5776 | 1.0495 | 2.00904 | – |
| 2025 Apr 14 17:56 | 2025 Apr 10 06:12:58 | 26.8264 | 0.73193 | 8.8514 | 338.5776 | 1.0495 | 2.00904 | – |
| 2025 Apr 11 17:57 | 2025 Apr 10 06:12:58 | 26.8264 | 0.73193 | 8.8514 | 338.5776 | 1.0495 | 2.00904 | – |