Orbital elements of ESIAFI 1
| Launched | 20 February 1981 |
| Flight ended | – |
| Launch site | Air Force Eastern Test Range, Florida, USA |
| Owner | United States |
| NORAD ID | 12309 |
| Alternative names |
COMSTAR 4 |
| 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 Jun 24 17:55 | 2026 Jun 21 22:07:08 | 8.6914 | 0.00035 | 20.7470 | 84.0993 | 275.9877 | 1.00273 | – |
| 2026 Jun 23 17:56 | 2026 Jun 21 22:07:08 | 8.6914 | 0.00035 | 20.7470 | 84.0993 | 275.9877 | 1.00273 | – |
| 2026 Jun 22 17:56 | 2026 Jun 16 22:27:01 | 8.7016 | 0.00033 | 20.7490 | 79.6827 | 275.9877 | 1.00273 | – |
| 2026 Jun 21 17:57 | 2026 Jun 16 22:27:01 | 8.7016 | 0.00033 | 20.7490 | 79.6827 | 275.9877 | 1.00273 | – |
| 2026 Jun 20 17:56 | 2026 Jun 16 22:27:01 | 8.7016 | 0.00033 | 20.7490 | 79.6827 | 275.9877 | 1.00273 | – |
| 2026 Jun 19 17:57 | 2026 Jun 16 22:27:01 | 8.7016 | 0.00033 | 20.7490 | 79.6827 | 275.9877 | 1.00273 | – |
| 2026 Jun 18 17:56 | 2026 Jun 16 22:27:01 | 8.7016 | 0.00033 | 20.7490 | 79.6827 | 275.9877 | 1.00273 | – |
| 2026 Jun 17 17:57 | 2026 Jun 16 22:27:01 | 8.7016 | 0.00033 | 20.7490 | 79.6827 | 275.9877 | 1.00273 | – |
| 2026 Jun 16 17:55 | 2026 Jun 11 22:46:32 | 8.7123 | 0.00033 | 20.7508 | 82.5124 | 275.9877 | 1.00273 | – |
| 2026 Jun 15 17:56 | 2026 Jun 11 22:46:32 | 8.7123 | 0.00033 | 20.7508 | 82.5124 | 275.9877 | 1.00273 | – |
| 2026 Jun 14 17:57 | 2026 Jun 11 22:46:32 | 8.7123 | 0.00033 | 20.7508 | 82.5124 | 275.9877 | 1.00273 | – |
| 2026 Jun 13 17:56 | 2026 Jun 11 22:46:32 | 8.7123 | 0.00033 | 20.7508 | 82.5124 | 275.9877 | 1.00273 | – |
| 2026 Jun 12 17:56 | 2026 Jun 11 22:46:32 | 8.7123 | 0.00033 | 20.7508 | 82.5124 | 275.9877 | 1.00273 | – |
| 2026 Jun 11 17:57 | 2026 Jun 06 23:06:18 | 8.7219 | 0.00035 | 20.7528 | 86.1419 | 275.9877 | 1.00273 | – |
| 2026 Jun 10 17:56 | 2026 Jun 06 23:06:18 | 8.7219 | 0.00035 | 20.7528 | 86.1419 | 275.9877 | 1.00273 | – |
| 2026 Jun 09 17:57 | 2026 Jun 06 23:06:18 | 8.7219 | 0.00035 | 20.7528 | 86.1419 | 275.9877 | 1.00273 | – |
| 2026 Jun 08 17:56 | 2026 Jun 06 23:06:18 | 8.7219 | 0.00035 | 20.7528 | 86.1419 | 275.9877 | 1.00273 | – |
| 2026 Jun 07 17:56 | 2026 Jun 06 23:06:18 | 8.7219 | 0.00035 | 20.7528 | 86.1419 | 275.9877 | 1.00273 | – |
| 2026 Jun 06 17:56 | 2026 May 30 23:33:46 | 8.7342 | 0.00038 | 20.7561 | 82.8670 | 275.9877 | 1.00273 | – |
| 2026 Jun 05 17:56 | 2026 May 30 23:33:46 | 8.7342 | 0.00038 | 20.7561 | 82.8670 | 275.9877 | 1.00273 | – |
| 2026 Jun 04 17:57 | 2026 May 30 23:33:46 | 8.7342 | 0.00038 | 20.7561 | 82.8670 | 275.9877 | 1.00273 | – |
| 2026 Jun 02 17:56 | 2026 May 30 23:33:46 | 8.7342 | 0.00038 | 20.7561 | 82.8670 | 275.9877 | 1.00273 | – |
| 2026 Jun 01 17:57 | 2026 May 30 23:33:46 | 8.7342 | 0.00038 | 20.7561 | 82.8670 | 275.9877 | 1.00273 | – |
| 2026 May 31 17:58 | 2026 May 30 23:33:46 | 8.7342 | 0.00038 | 20.7561 | 82.8670 | 275.9877 | 1.00273 | – |
| 2026 May 30 17:57 | 2026 May 25 23:53:17 | 8.7432 | 0.00039 | 20.7585 | 77.0861 | 275.9877 | 1.00273 | – |
| 2026 May 29 17:57 | 2026 May 25 23:53:17 | 8.7432 | 0.00039 | 20.7585 | 77.0861 | 275.9877 | 1.00273 | – |
| 2026 May 28 17:56 | 2026 May 25 23:53:17 | 8.7432 | 0.00039 | 20.7585 | 77.0861 | 275.9877 | 1.00273 | – |