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 |
| 2026 May 18 17:57 | 2026 May 15 21:28:50 | 27.6180 | 0.73046 | 1.3462 | 164.7225 | 242.9075 | 2.00744 | – |
| 2026 May 17 17:57 | 2026 May 15 21:28:50 | 27.6180 | 0.73046 | 1.3462 | 164.7225 | 242.9075 | 2.00744 | – |
| 2026 May 16 17:56 | 2026 May 15 21:28:50 | 27.6180 | 0.73046 | 1.3462 | 164.7225 | 242.9075 | 2.00744 | – |
| 2026 May 15 17:57 | 2026 May 07 22:36:57 | 27.5936 | 0.73051 | 1.4941 | 161.0645 | 242.9075 | 2.00744 | – |
| 2026 May 14 17:58 | 2026 May 07 22:36:57 | 27.5936 | 0.73051 | 1.4941 | 161.0645 | 242.9075 | 2.00744 | – |
| 2026 May 13 17:58 | 2026 May 07 22:36:57 | 27.5936 | 0.73051 | 1.4941 | 161.0645 | 242.9075 | 2.00744 | – |
| 2026 May 12 17:58 | 2026 May 07 22:36:57 | 27.5936 | 0.73051 | 1.4941 | 161.0645 | 242.9075 | 2.00744 | – |
| 2026 May 11 17:56 | 2026 May 07 22:36:57 | 27.5936 | 0.73051 | 1.4941 | 161.0645 | 242.9075 | 2.00744 | – |
| 2026 May 10 17:57 | 2026 May 07 22:36:57 | 27.5936 | 0.73051 | 1.4941 | 161.0645 | 242.9075 | 2.00744 | – |
| 2026 May 09 17:57 | 2026 May 04 23:01:48 | 27.5853 | 0.73051 | 1.5497 | 159.6903 | 242.9075 | 2.00744 | – |
| 2026 May 08 17:57 | 2026 May 04 23:01:48 | 27.5853 | 0.73051 | 1.5497 | 159.6903 | 242.9075 | 2.00744 | – |
| 2026 May 07 17:58 | 2026 May 04 23:01:48 | 27.5853 | 0.73051 | 1.5497 | 159.6903 | 242.9075 | 2.00744 | – |
| 2026 May 06 17:57 | 2026 May 04 23:01:48 | 27.5853 | 0.73051 | 1.5497 | 159.6903 | 242.9075 | 2.00744 | – |
| 2026 May 05 17:57 | 2026 May 04 23:01:48 | 27.5853 | 0.73051 | 1.5497 | 159.6903 | 242.9075 | 2.00744 | – |
| 2026 May 04 17:57 | 2026 Apr 29 23:42:41 | 27.5743 | 0.73053 | 1.6424 | 157.3964 | 242.9075 | 2.00744 | – |
| 2026 May 03 17:57 | 2026 Apr 29 23:42:41 | 27.5743 | 0.73053 | 1.6424 | 157.3964 | 242.9075 | 2.00744 | – |
| 2026 May 02 17:57 | 2026 Apr 29 23:42:41 | 27.5743 | 0.73053 | 1.6424 | 157.3964 | 242.9075 | 2.00744 | – |
| 2026 May 01 17:56 | 2026 Apr 29 23:42:41 | 27.5743 | 0.73053 | 1.6424 | 157.3964 | 242.9075 | 2.00744 | – |
| 2026 Apr 30 17:56 | 2026 Apr 29 23:42:41 | 27.5743 | 0.73053 | 1.6424 | 157.3964 | 242.9075 | 2.00744 | – |
| 2026 Apr 29 17:57 | 2026 Apr 24 00:30:25 | 27.5575 | 0.73053 | 1.7543 | 154.6197 | 242.9075 | 2.00744 | – |
| 2026 Apr 28 17:56 | 2026 Apr 24 00:30:25 | 27.5575 | 0.73053 | 1.7543 | 154.6197 | 242.9075 | 2.00744 | – |
| 2026 Apr 27 17:58 | 2026 Apr 24 00:30:25 | 27.5575 | 0.73053 | 1.7543 | 154.6197 | 242.9075 | 2.00744 | – |
| 2026 Apr 26 17:58 | 2026 Apr 24 00:30:25 | 27.5575 | 0.73053 | 1.7543 | 154.6197 | 242.9075 | 2.00744 | – |
| 2026 Apr 25 17:58 | 2026 Apr 24 00:30:25 | 27.5575 | 0.73053 | 1.7543 | 154.6197 | 242.9075 | 2.00744 | – |
| 2026 Apr 24 17:59 | 2026 Apr 24 00:30:25 | 27.5575 | 0.73053 | 1.7543 | 154.6197 | 242.9075 | 2.00744 | – |
| 2026 Apr 23 17:57 | 2026 Apr 19 01:09:03 | 27.5422 | 0.73057 | 1.8477 | 152.3082 | 242.9075 | 2.00744 | – |
| 2026 Apr 22 17:57 | 2026 Apr 19 01:09:03 | 27.5422 | 0.73057 | 1.8477 | 152.3082 | 242.9075 | 2.00744 | – |
| 2026 Apr 21 17:57 | 2026 Apr 19 01:09:03 | 27.5422 | 0.73057 | 1.8477 | 152.3082 | 242.9075 | 2.00744 | – |