Orbital elements of USA 18
| Launched | 8 February 1986 |
| Flight ended | – |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 16631 |
| 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 Nov 04 18:57 | 2025 Nov 02 08:30:13 | 63.2926 | 0.07822 | 20.4896 | 108.0699 | 260.7103 | 13.87650 | 6.743 |
| 2025 Nov 03 18:57 | 2025 Nov 02 08:30:13 | 63.2926 | 0.07822 | 20.4896 | 108.0699 | 260.7103 | 13.87650 | 6.743 |
| 2025 Nov 02 18:57 | 2025 Oct 29 09:22:36 | 63.2934 | 0.07827 | 21.2308 | 108.0066 | 260.7103 | 13.87650 | 6.743 |
| 2025 Nov 01 18:58 | 2025 Oct 29 09:22:36 | 63.2934 | 0.07827 | 21.2308 | 108.0066 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 31 18:57 | 2025 Oct 29 09:22:36 | 63.2934 | 0.07827 | 21.2308 | 108.0066 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 30 18:57 | 2025 Oct 29 09:22:36 | 63.2934 | 0.07827 | 21.2308 | 108.0066 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 29 18:57 | 2025 Oct 29 09:22:36 | 63.2934 | 0.07827 | 21.2308 | 108.0066 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 28 18:57 | 2025 Oct 23 11:32:29 | 63.2935 | 0.07834 | 22.3357 | 107.8852 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 27 18:57 | 2025 Oct 23 11:32:29 | 63.2935 | 0.07834 | 22.3357 | 107.8852 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 26 18:57 | 2025 Oct 23 11:32:29 | 63.2935 | 0.07834 | 22.3357 | 107.8852 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 25 17:57 | 2025 Oct 23 11:32:29 | 63.2935 | 0.07834 | 22.3357 | 107.8852 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 24 17:57 | 2025 Oct 23 11:32:29 | 63.2935 | 0.07834 | 22.3357 | 107.8852 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 22 17:56 | 2025 Oct 18 06:59:37 | 63.2951 | 0.07840 | 23.3058 | 107.7887 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 21 17:56 | 2025 Oct 18 06:59:37 | 63.2951 | 0.07840 | 23.3058 | 107.7887 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 20 17:56 | 2025 Oct 18 06:59:37 | 63.2951 | 0.07840 | 23.3058 | 107.7887 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 19 17:56 | 2025 Oct 18 06:59:37 | 63.2951 | 0.07840 | 23.3058 | 107.7887 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 18 17:56 | 2025 Oct 18 06:59:37 | 63.2951 | 0.07840 | 23.3058 | 107.7887 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 17 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 16 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 15 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 14 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 12 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 11 17:57 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 09 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |
| 2025 Oct 08 17:56 | 2025 Oct 07 09:45:21 | 63.2952 | 0.07855 | 1.3399 | 107.5806 | 260.7103 | 13.87650 | 6.743 |