Orbital elements of USA 55
| Launched | 4 April 1990 |
| Flight ended | – |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 20547 |
| 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 Sep 12 17:57 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 11 17:57 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 10 17:56 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 08 17:57 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 07 17:56 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 06 20:41 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 03 17:57 | 2025 Sep 03 00:05:05 | 94.1067 | 0.00614 | 22.7940 | 154.5582 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 02 17:56 | 2025 Aug 27 19:56:30 | 94.1071 | 0.00606 | 22.5627 | 177.9095 | 205.8716 | 15.40193 | 9.743 |
| 2025 Sep 01 17:56 | 2025 Aug 27 19:56:30 | 94.1071 | 0.00606 | 22.5627 | 177.9095 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 31 17:56 | 2025 Aug 27 19:56:30 | 94.1071 | 0.00606 | 22.5627 | 177.9095 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 30 17:56 | 2025 Aug 27 19:56:30 | 94.1071 | 0.00606 | 22.5627 | 177.9095 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 29 17:56 | 2025 Aug 27 19:56:30 | 94.1071 | 0.00606 | 22.5627 | 177.9095 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 28 17:57 | 2025 Aug 27 19:56:30 | 94.1071 | 0.00606 | 22.5627 | 177.9095 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 27 17:56 | 2025 Aug 23 06:46:37 | 94.1078 | 0.00599 | 22.3922 | 195.3824 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 26 17:56 | 2025 Aug 23 06:46:37 | 94.1078 | 0.00599 | 22.3922 | 195.3824 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 25 17:56 | 2025 Aug 23 06:46:37 | 94.1078 | 0.00599 | 22.3922 | 195.3824 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 24 17:56 | 2025 Aug 23 06:46:37 | 94.1078 | 0.00599 | 22.3922 | 195.3824 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 23 17:56 | 2025 Aug 23 06:46:37 | 94.1078 | 0.00599 | 22.3922 | 195.3824 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 22 17:56 | 2025 Aug 17 18:12:54 | 94.1066 | 0.00592 | 22.1852 | 216.8588 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 20 17:56 | 2025 Aug 17 18:12:54 | 94.1066 | 0.00592 | 22.1852 | 216.8588 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 19 17:56 | 2025 Aug 17 18:12:54 | 94.1066 | 0.00592 | 22.1852 | 216.8588 | 205.8716 | 15.40193 | 9.743 |
| 2025 Aug 18 17:56 | 2025 Aug 17 18:12:54 | 94.1066 | 0.00592 | 22.1852 | 216.8588 | 205.8716 | 15.40193 | 9.743 |