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 Feb 05 18:58 | 2026 Feb 02 09:39:26 | 27.3487 | 0.73028 | 3.2815 | 116.8315 | 332.6927 | 2.00785 | – |
| 2026 Feb 04 18:57 | 2026 Feb 02 09:39:26 | 27.3487 | 0.73028 | 3.2815 | 116.8315 | 332.6927 | 2.00785 | – |
| 2026 Feb 03 18:56 | 2026 Feb 02 09:39:26 | 27.3487 | 0.73028 | 3.2815 | 116.8315 | 332.6927 | 2.00785 | – |
| 2026 Feb 02 18:56 | 2026 Feb 02 09:39:26 | 27.3487 | 0.73028 | 3.2815 | 116.8315 | 332.6927 | 2.00785 | – |
| 2026 Feb 01 18:56 | 2026 Jan 23 10:41:59 | 27.3276 | 0.73012 | 3.4708 | 112.1588 | 332.6927 | 2.00785 | – |
| 2026 Jan 31 18:56 | 2026 Jan 23 10:41:59 | 27.3276 | 0.73012 | 3.4708 | 112.1588 | 332.6927 | 2.00785 | – |
| 2026 Jan 30 18:57 | 2026 Jan 23 10:41:59 | 27.3276 | 0.73012 | 3.4708 | 112.1588 | 332.6927 | 2.00785 | – |
| 2026 Jan 29 18:56 | 2026 Jan 23 10:41:59 | 27.3276 | 0.73012 | 3.4708 | 112.1588 | 332.6927 | 2.00785 | – |
| 2026 Jan 28 18:56 | 2026 Jan 23 10:41:59 | 27.3276 | 0.73012 | 3.4708 | 112.1588 | 332.6927 | 2.00785 | – |
| 2026 Jan 27 18:56 | 2026 Jan 22 10:48:14 | 27.3256 | 0.73010 | 3.4898 | 111.6916 | 332.6927 | 2.00785 | – |
| 2026 Jan 26 18:57 | 2026 Jan 22 10:48:14 | 27.3256 | 0.73010 | 3.4898 | 111.6916 | 332.6927 | 2.00785 | – |
| 2026 Jan 25 18:57 | 2026 Jan 22 10:48:14 | 27.3256 | 0.73010 | 3.4898 | 111.6916 | 332.6927 | 2.00785 | – |
| 2026 Jan 24 18:58 | 2026 Jan 22 10:48:14 | 27.3256 | 0.73010 | 3.4898 | 111.6916 | 332.6927 | 2.00785 | – |
| 2026 Jan 22 18:56 | 2026 Jan 22 10:48:14 | 27.3256 | 0.73010 | 3.4898 | 111.6916 | 332.6927 | 2.00785 | – |
| 2026 Jan 21 18:56 | 2026 Jan 16 11:25:39 | 27.3142 | 0.72999 | 3.6032 | 108.8932 | 332.6927 | 2.00785 | – |
| 2026 Jan 20 19:06 | 2026 Jan 16 11:25:39 | 27.3142 | 0.72999 | 3.6032 | 108.8932 | 332.6927 | 2.00785 | – |