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 Oct 19 17:56 | 2025 Oct 16 21:19:40 | 27.2962 | 0.72846 | 5.3177 | 66.5746 | 351.3299 | 2.00895 | – |
| 2025 Oct 18 17:56 | 2025 Oct 16 21:19:40 | 27.2962 | 0.72846 | 5.3177 | 66.5746 | 351.3299 | 2.00895 | – |
| 2025 Oct 17 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 16 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 15 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 14 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 12 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 11 17:57 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 09 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 08 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 07 17:56 | 2025 Oct 07 10:22:13 | 27.3002 | 0.72842 | 5.4929 | 62.2258 | 351.3299 | 2.00895 | – |
| 2025 Oct 05 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Oct 04 17:57 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Oct 03 17:57 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Oct 02 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Sep 30 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Sep 29 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Sep 28 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Sep 27 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Sep 26 17:56 | 2025 Sep 23 23:51:01 | 27.3027 | 0.72840 | 5.7418 | 56.0404 | 351.3299 | 2.00895 | – |
| 2025 Sep 25 17:56 | 2025 Sep 19 12:20:39 | 27.3027 | 0.72841 | 5.8246 | 53.9800 | 351.3299 | 2.00895 | – |
| 2025 Sep 24 17:56 | 2025 Sep 19 12:20:39 | 27.3027 | 0.72841 | 5.8246 | 53.9800 | 351.3299 | 2.00895 | – |