Orbital elements of USA 81
| Launched | 24 April 1992 |
| Flight ended | – |
| Launch site | Air Force Western Test Range, California, USA |
| Owner | United States |
| NORAD ID | 21949 |
| 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 May 25 17:57 | 2026 May 25 08:41:12 | 85.0069 | 0.00025 | 5.8120 | 104.2875 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 24 17:57 | 2026 May 24 02:30:30 | 85.0067 | 0.00024 | 5.8603 | 105.0584 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 23 17:58 | 2026 May 23 08:03:59 | 85.0066 | 0.00024 | 5.8899 | 105.6947 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 22 17:57 | 2026 May 22 05:14:29 | 85.0065 | 0.00024 | 5.9329 | 106.4417 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 21 17:57 | 2026 May 21 05:46:10 | 85.0064 | 0.00023 | 5.9705 | 107.1052 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 20 17:57 | 2026 May 20 07:58:27 | 85.0063 | 0.00023 | 6.0055 | 107.5597 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 19 17:58 | 2026 May 19 08:30:09 | 85.0062 | 0.00023 | 6.0431 | 108.1107 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 18 17:57 | 2026 May 18 07:21:14 | 85.0062 | 0.00022 | 6.0834 | 108.7834 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 17 17:57 | 2026 May 17 09:33:31 | 85.0060 | 0.00022 | 6.1184 | 109.2812 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 16 17:56 | 2026 May 16 01:42:14 | 85.0060 | 0.00021 | 6.1694 | 109.8548 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 15 17:57 | 2026 May 15 05:35:07 | 85.0059 | 0.00021 | 6.2017 | 110.1932 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 14 17:58 | 2026 May 14 06:06:48 | 85.0057 | 0.00021 | 6.2393 | 110.6205 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 13 17:58 | 2026 May 13 08:19:05 | 85.0056 | 0.00020 | 6.2743 | 110.9941 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 12 17:58 | 2026 May 12 03:48:59 | 85.0054 | 0.00020 | 6.3200 | 111.1422 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 11 17:56 | 2026 May 11 09:22:28 | 85.0052 | 0.00019 | 6.3496 | 111.4701 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 10 17:57 | 2026 May 10 09:54:09 | 85.0051 | 0.00019 | 6.3872 | 111.5682 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 09 17:57 | 2026 May 09 10:25:50 | 85.0049 | 0.00018 | 6.4248 | 111.5837 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 08 17:57 | 2026 May 07 23:13:22 | 85.0047 | 0.00018 | 6.4813 | 111.4568 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 07 17:58 | 2026 May 07 06:27:25 | 85.0047 | 0.00018 | 6.5082 | 111.4628 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 06 17:57 | 2026 May 06 08:39:42 | 85.0046 | 0.00017 | 6.5431 | 111.5147 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 05 17:57 | 2026 May 05 09:11:23 | 85.0046 | 0.00017 | 6.5808 | 111.2856 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 04 17:57 | 2026 May 04 11:23:40 | 85.0045 | 0.00016 | 6.6157 | 110.8699 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 03 17:57 | 2026 May 03 10:14:46 | 85.0044 | 0.00016 | 6.6561 | 110.4423 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 02 17:57 | 2026 May 02 09:05:51 | 85.0042 | 0.00015 | 6.6964 | 110.0239 | 255.8591 | 14.32391 | 5.243 |
| 2026 May 01 17:56 | 2026 May 01 11:18:08 | 85.0041 | 0.00015 | 6.7313 | 109.3442 | 255.8591 | 14.32391 | 5.243 |
| 2026 Apr 30 17:56 | 2026 Apr 30 10:09:13 | 85.0040 | 0.00015 | 6.7717 | 108.4371 | 255.8591 | 14.32391 | 5.243 |
| 2026 Apr 29 17:57 | 2026 Apr 29 10:40:54 | 85.0039 | 0.00014 | 6.8093 | 107.5439 | 255.8591 | 14.32391 | 5.243 |
| 2026 Apr 28 17:56 | 2026 Apr 28 11:12:35 | 85.0038 | 0.00014 | 6.8470 | 106.4926 | 255.8591 | 14.32391 | 5.243 |