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 |
| 2024 May 05 17:52 | 2024 May 01 18:15:07 | 63.2937 | 0.08731 | 1.9843 | 97.2005 | 272.9016 | 13.69128 | 6.743 |
| 2024 May 04 17:52 | 2024 May 01 18:15:07 | 63.2937 | 0.08731 | 1.9843 | 97.2005 | 272.9016 | 13.69128 | 6.743 |
| 2024 May 03 17:52 | 2024 May 01 18:15:07 | 63.2937 | 0.08731 | 1.9843 | 97.2005 | 272.9016 | 13.69128 | 6.743 |
| 2024 May 02 17:52 | 2024 May 01 18:15:07 | 63.2937 | 0.08731 | 1.9843 | 97.2005 | 272.9016 | 13.69128 | 6.743 |
| 2024 May 01 17:54 | 2024 Apr 27 12:34:37 | 63.2939 | 0.08737 | 2.7544 | 97.1099 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 30 17:57 | 2024 Apr 27 12:34:37 | 63.2939 | 0.08737 | 2.7544 | 97.1099 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 29 17:52 | 2024 Apr 27 12:34:37 | 63.2939 | 0.08737 | 2.7544 | 97.1099 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 28 17:52 | 2024 Apr 27 12:34:37 | 63.2939 | 0.08737 | 2.7544 | 97.1099 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 27 17:58 | 2024 Apr 27 12:34:37 | 63.2939 | 0.08737 | 2.7544 | 97.1099 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 26 17:54 | 2024 Apr 22 04:35:14 | 63.2926 | 0.08748 | 3.7233 | 97.0083 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 25 17:55 | 2024 Apr 22 04:35:14 | 63.2926 | 0.08748 | 3.7233 | 97.0083 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 24 17:53 | 2024 Apr 22 04:35:14 | 63.2926 | 0.08748 | 3.7233 | 97.0083 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 23 17:53 | 2024 Apr 22 04:35:14 | 63.2926 | 0.08748 | 3.7233 | 97.0083 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 22 17:52 | 2024 Apr 22 04:35:14 | 63.2926 | 0.08748 | 3.7233 | 97.0083 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 21 17:53 | 2024 Apr 16 04:47:21 | 63.2913 | 0.08760 | 4.8116 | 96.8798 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 20 17:52 | 2024 Apr 16 04:47:21 | 63.2913 | 0.08760 | 4.8116 | 96.8798 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 19 17:53 | 2024 Apr 16 04:47:21 | 63.2913 | 0.08760 | 4.8116 | 96.8798 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 18 17:57 | 2024 Apr 16 04:47:21 | 63.2913 | 0.08760 | 4.8116 | 96.8798 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 17 17:53 | 2024 Apr 16 04:47:21 | 63.2913 | 0.08760 | 4.8116 | 96.8798 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 16 17:53 | 2024 Apr 16 04:47:21 | 63.2913 | 0.08760 | 4.8116 | 96.8798 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 15 17:54 | 2024 Apr 10 04:58:01 | 63.2900 | 0.08767 | 5.8996 | 96.7581 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 14 17:53 | 2024 Apr 10 04:58:01 | 63.2900 | 0.08767 | 5.8996 | 96.7581 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 13 17:53 | 2024 Apr 10 04:58:01 | 63.2900 | 0.08767 | 5.8996 | 96.7581 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 12 17:53 | 2024 Apr 10 04:58:01 | 63.2900 | 0.08767 | 5.8996 | 96.7581 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 11 17:54 | 2024 Apr 10 04:58:01 | 63.2900 | 0.08767 | 5.8996 | 96.7581 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 10 17:56 | 2024 Apr 10 04:58:01 | 63.2900 | 0.08767 | 5.8996 | 96.7581 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 09 17:56 | 2024 Apr 05 09:11:48 | 63.2894 | 0.08772 | 6.7754 | 96.6599 | 272.9016 | 13.69128 | 6.743 |
| 2024 Apr 08 17:55 | 2024 Apr 05 09:11:48 | 63.2894 | 0.08772 | 6.7754 | 96.6599 | 272.9016 | 13.69128 | 6.743 |