Orbital elements of USA 121
| Launched | 11 May 1996 | 
| Flight ended | – | 
| Launch site | Air Force Western Test Range, California, USA | 
| Owner | United States | 
| NORAD ID | 23908 | 
| 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 03 18:57 | 2025 Nov 02 10:33:42 | 63.3229 | 0.08400 | 4.2990 | 46.0079 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Nov 02 18:57 | 2025 Oct 29 12:01:08 | 63.3223 | 0.08398 | 4.9850 | 45.9465 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Nov 01 18:58 | 2025 Oct 29 12:01:08 | 63.3223 | 0.08398 | 4.9850 | 45.9465 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 31 18:57 | 2025 Oct 29 12:01:08 | 63.3223 | 0.08398 | 4.9850 | 45.9465 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 30 18:57 | 2025 Oct 29 12:01:08 | 63.3223 | 0.08398 | 4.9850 | 45.9465 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 29 18:57 | 2025 Oct 29 12:01:08 | 63.3223 | 0.08398 | 4.9850 | 45.9465 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 28 18:57 | 2025 Oct 23 20:26:47 | 63.3211 | 0.08395 | 5.9687 | 45.8604 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 27 18:57 | 2025 Oct 23 20:26:47 | 63.3211 | 0.08395 | 5.9687 | 45.8604 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 26 18:57 | 2025 Oct 23 20:26:47 | 63.3211 | 0.08395 | 5.9687 | 45.8604 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 25 17:57 | 2025 Oct 23 20:26:47 | 63.3211 | 0.08395 | 5.9687 | 45.8604 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 24 17:57 | 2025 Oct 23 20:26:47 | 63.3211 | 0.08395 | 5.9687 | 45.8604 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 22 17:56 | 2025 Oct 18 06:39:24 | 63.3202 | 0.08392 | 6.9394 | 45.7734 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 21 17:56 | 2025 Oct 18 06:39:24 | 63.3202 | 0.08392 | 6.9394 | 45.7734 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 20 17:56 | 2025 Oct 18 06:39:24 | 63.3202 | 0.08392 | 6.9394 | 45.7734 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 19 17:56 | 2025 Oct 18 06:39:24 | 63.3202 | 0.08392 | 6.9394 | 45.7734 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 18 17:56 | 2025 Oct 18 06:39:24 | 63.3202 | 0.08392 | 6.9394 | 45.7734 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 17 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 16 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 15 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 14 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 12 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 11 17:57 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 09 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 08 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 | 
| 2025 Oct 07 17:56 | 2025 Oct 07 13:46:29 | 63.3212 | 0.08387 | 8.8032 | 45.6015 | 320.7150 | 13.45420 | 5.243 |