Orbital elements of EXPLORER 31
| Launched | 28 November 1965 |
| Flight ended | – |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 1806 |
| Alternative names |
ISIS-X |
| 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 Aug 31 17:56 | 2025 Aug 27 17:31:20 | 79.7734 | 0.14245 | 15.4538 | 349.6538 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 30 17:56 | 2025 Aug 27 17:31:20 | 79.7734 | 0.14245 | 15.4538 | 349.6538 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 29 17:56 | 2025 Aug 27 17:31:20 | 79.7734 | 0.14245 | 15.4538 | 349.6538 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 28 17:57 | 2025 Aug 27 17:31:20 | 79.7734 | 0.14245 | 15.4538 | 349.6538 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 27 17:56 | 2025 Aug 23 06:11:57 | 79.7741 | 0.14245 | 15.6996 | 358.4129 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 26 17:56 | 2025 Aug 23 06:11:57 | 79.7741 | 0.14245 | 15.6996 | 358.4129 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 25 17:56 | 2025 Aug 23 06:11:57 | 79.7741 | 0.14245 | 15.6996 | 358.4129 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 24 17:56 | 2025 Aug 23 06:11:57 | 79.7741 | 0.14245 | 15.6996 | 358.4129 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 23 17:56 | 2025 Aug 23 06:11:57 | 79.7741 | 0.14245 | 15.6996 | 358.4129 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 22 17:56 | 2025 Aug 17 19:01:35 | 79.7747 | 0.14245 | 15.9999 | 9.1247 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 20 17:56 | 2025 Aug 17 19:01:35 | 79.7747 | 0.14245 | 15.9999 | 9.1247 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 19 17:56 | 2025 Aug 17 19:01:35 | 79.7747 | 0.14245 | 15.9999 | 9.1247 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 18 17:56 | 2025 Aug 17 19:01:35 | 79.7747 | 0.14245 | 15.9999 | 9.1247 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 16 17:56 | 2025 Aug 12 01:53:25 | 79.7750 | 0.14245 | 16.3139 | 20.3261 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 15 17:57 | 2025 Aug 12 01:53:25 | 79.7750 | 0.14245 | 16.3139 | 20.3261 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 14 17:56 | 2025 Aug 12 01:53:25 | 79.7750 | 0.14245 | 16.3139 | 20.3261 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 13 17:58 | 2025 Aug 12 01:53:25 | 79.7750 | 0.14245 | 16.3139 | 20.3261 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 12 17:56 | 2025 Aug 12 01:53:25 | 79.7750 | 0.14245 | 16.3139 | 20.3261 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 11 17:56 | 2025 Aug 06 20:40:39 | 79.7750 | 0.14246 | 16.6005 | 30.5516 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 10 17:57 | 2025 Aug 06 20:40:39 | 79.7750 | 0.14246 | 16.6005 | 30.5516 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 09 17:56 | 2025 Aug 06 20:40:39 | 79.7750 | 0.14246 | 16.6005 | 30.5516 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 08 17:56 | 2025 Aug 06 20:40:39 | 79.7750 | 0.14246 | 16.6005 | 30.5516 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 07 17:56 | 2025 Aug 06 20:40:39 | 79.7750 | 0.14246 | 16.6005 | 30.5516 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 05 17:56 | 2025 Jul 31 19:35:14 | 79.7748 | 0.14247 | 16.9326 | 42.3960 | 7.7819 | 12.07974 | 9.243 |
| 2025 Aug 04 17:56 | 2025 Jul 31 19:35:14 | 79.7748 | 0.14247 | 16.9326 | 42.3960 | 7.7819 | 12.07974 | 9.243 |