Orbital elements of COSMOS 621
| Launched | 18 December 1973 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 6989 |
| 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 31 17:58 | 2026 May 31 09:54:40 | 74.0268 | 0.00509 | 8.5740 | 230.8724 | 248.0599 | 12.54677 | – |
| 2026 May 30 17:57 | 2026 May 26 07:23:22 | 74.0261 | 0.00510 | 9.0303 | 238.5479 | 248.0599 | 12.54677 | – |
| 2026 May 29 17:57 | 2026 May 26 07:23:22 | 74.0261 | 0.00510 | 9.0303 | 238.5479 | 248.0599 | 12.54677 | – |
| 2026 May 28 17:56 | 2026 May 26 07:23:22 | 74.0261 | 0.00510 | 9.0303 | 238.5479 | 248.0599 | 12.54677 | – |
| 2026 May 27 17:57 | 2026 May 26 07:23:22 | 74.0261 | 0.00510 | 9.0303 | 238.5479 | 248.0599 | 12.54677 | – |
| 2026 May 26 17:57 | 2026 May 26 07:23:22 | 74.0261 | 0.00510 | 9.0303 | 238.5479 | 248.0599 | 12.54677 | – |
| 2026 May 25 17:57 | 2026 May 21 10:59:10 | 74.0259 | 0.00510 | 9.4638 | 245.8239 | 248.0599 | 12.54677 | – |
| 2026 May 24 17:57 | 2026 May 21 10:59:10 | 74.0259 | 0.00510 | 9.4638 | 245.8239 | 248.0599 | 12.54677 | – |
| 2026 May 23 17:58 | 2026 May 21 10:59:10 | 74.0259 | 0.00510 | 9.4638 | 245.8239 | 248.0599 | 12.54677 | – |
| 2026 May 22 17:57 | 2026 May 21 10:59:10 | 74.0259 | 0.00510 | 9.4638 | 245.8239 | 248.0599 | 12.54677 | – |
| 2026 May 21 17:57 | 2026 May 21 10:59:10 | 74.0259 | 0.00510 | 9.4638 | 245.8239 | 248.0599 | 12.54677 | – |
| 2026 May 20 17:57 | 2026 May 16 10:21:44 | 74.0263 | 0.00510 | 9.9130 | 253.3684 | 248.0599 | 12.54677 | – |
| 2026 May 19 17:58 | 2026 May 16 10:21:44 | 74.0263 | 0.00510 | 9.9130 | 253.3684 | 248.0599 | 12.54677 | – |
| 2026 May 18 17:57 | 2026 May 16 10:21:44 | 74.0263 | 0.00510 | 9.9130 | 253.3684 | 248.0599 | 12.54677 | – |
| 2026 May 17 17:57 | 2026 May 16 10:21:44 | 74.0263 | 0.00510 | 9.9130 | 253.3684 | 248.0599 | 12.54677 | – |
| 2026 May 16 17:56 | 2026 May 16 10:21:44 | 74.0263 | 0.00510 | 9.9130 | 253.3684 | 248.0599 | 12.54677 | – |
| 2026 May 15 17:57 | 2026 May 10 12:33:37 | 74.0266 | 0.00510 | 10.4411 | 262.2280 | 248.0599 | 12.54677 | – |
| 2026 May 14 17:58 | 2026 May 10 12:33:37 | 74.0266 | 0.00510 | 10.4411 | 262.2280 | 248.0599 | 12.54677 | – |
| 2026 May 13 17:58 | 2026 May 10 12:33:37 | 74.0266 | 0.00510 | 10.4411 | 262.2280 | 248.0599 | 12.54677 | – |
| 2026 May 12 17:58 | 2026 May 10 12:33:37 | 74.0266 | 0.00510 | 10.4411 | 262.2280 | 248.0599 | 12.54677 | – |
| 2026 May 11 17:56 | 2026 May 10 12:33:37 | 74.0266 | 0.00510 | 10.4411 | 262.2280 | 248.0599 | 12.54677 | – |
| 2026 May 10 17:57 | 2026 May 10 12:33:37 | 74.0266 | 0.00510 | 10.4411 | 262.2280 | 248.0599 | 12.54677 | – |
| 2026 May 09 17:57 | 2026 May 05 09:32:31 | 74.0275 | 0.00510 | 10.8992 | 269.8999 | 248.0599 | 12.54677 | – |
| 2026 May 08 17:57 | 2026 May 05 09:32:31 | 74.0275 | 0.00510 | 10.8992 | 269.8999 | 248.0599 | 12.54677 | – |
| 2026 May 07 17:58 | 2026 May 05 09:32:31 | 74.0275 | 0.00510 | 10.8992 | 269.8999 | 248.0599 | 12.54677 | – |
| 2026 May 06 17:57 | 2026 May 05 09:32:31 | 74.0275 | 0.00510 | 10.8992 | 269.8999 | 248.0599 | 12.54677 | – |
| 2026 May 05 17:57 | 2026 May 05 09:32:31 | 74.0275 | 0.00510 | 10.8992 | 269.8999 | 248.0599 | 12.54677 | – |
| 2026 May 04 17:57 | 2026 Apr 30 11:25:00 | 74.0281 | 0.00510 | 11.3391 | 277.2710 | 248.0599 | 12.54677 | – |