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 Mar 31 17:57 | 2026 Mar 26 09:14:21 | 74.0291 | 0.00506 | 14.4749 | 330.0685 | 91.4110 | 12.54676 | – |
| 2026 Mar 30 17:58 | 2026 Mar 26 09:14:21 | 74.0291 | 0.00506 | 14.4749 | 330.0685 | 91.4110 | 12.54676 | – |
| 2026 Mar 29 17:57 | 2026 Mar 26 09:14:21 | 74.0291 | 0.00506 | 14.4749 | 330.0685 | 91.4110 | 12.54676 | – |
| 2026 Mar 28 18:57 | 2026 Mar 26 09:14:21 | 74.0291 | 0.00506 | 14.4749 | 330.0685 | 91.4110 | 12.54676 | – |
| 2026 Mar 27 18:57 | 2026 Mar 26 09:14:21 | 74.0291 | 0.00506 | 14.4749 | 330.0685 | 91.4110 | 12.54676 | – |
| 2026 Mar 26 18:57 | 2026 Mar 26 09:14:21 | 74.0291 | 0.00506 | 14.4749 | 330.0685 | 91.4110 | 12.54676 | – |
| 2026 Mar 25 18:56 | 2026 Mar 20 09:44:20 | 74.0278 | 0.00505 | 15.0092 | 339.1104 | 91.4110 | 12.54676 | – |
| 2026 Mar 24 18:56 | 2026 Mar 20 09:44:20 | 74.0278 | 0.00505 | 15.0092 | 339.1104 | 91.4110 | 12.54676 | – |
| 2026 Mar 23 18:56 | 2026 Mar 20 09:44:20 | 74.0278 | 0.00505 | 15.0092 | 339.1104 | 91.4110 | 12.54676 | – |
| 2026 Mar 22 18:56 | 2026 Mar 20 09:44:20 | 74.0278 | 0.00505 | 15.0092 | 339.1104 | 91.4110 | 12.54676 | – |
| 2026 Mar 21 19:05 | 2026 Mar 20 09:44:20 | 74.0278 | 0.00505 | 15.0092 | 339.1104 | 91.4110 | 12.54676 | – |
| 2026 Mar 20 18:57 | 2026 Mar 20 09:44:20 | 74.0278 | 0.00505 | 15.0092 | 339.1104 | 91.4110 | 12.54676 | – |
| 2026 Mar 19 18:56 | 2026 Mar 15 13:01:48 | 74.0273 | 0.00504 | 15.4439 | 346.4669 | 91.4110 | 12.54676 | – |
| 2026 Mar 18 18:56 | 2026 Mar 15 13:01:48 | 74.0273 | 0.00504 | 15.4439 | 346.4669 | 91.4110 | 12.54676 | – |
| 2026 Mar 17 18:56 | 2026 Mar 15 13:01:48 | 74.0273 | 0.00504 | 15.4439 | 346.4669 | 91.4110 | 12.54676 | – |
| 2026 Mar 16 18:57 | 2026 Mar 15 13:01:48 | 74.0273 | 0.00504 | 15.4439 | 346.4669 | 91.4110 | 12.54676 | – |
| 2026 Mar 15 18:56 | 2026 Mar 15 13:01:48 | 74.0273 | 0.00504 | 15.4439 | 346.4669 | 91.4110 | 12.54676 | – |
| 2026 Mar 14 18:56 | 2026 Mar 10 12:25:39 | 74.0265 | 0.00503 | 15.8930 | 354.0441 | 91.4110 | 12.54676 | – |
| 2026 Mar 13 18:57 | 2026 Mar 10 12:25:39 | 74.0265 | 0.00503 | 15.8930 | 354.0441 | 91.4110 | 12.54676 | – |
| 2026 Mar 12 18:57 | 2026 Mar 10 12:25:39 | 74.0265 | 0.00503 | 15.8930 | 354.0441 | 91.4110 | 12.54676 | – |
| 2026 Mar 11 18:56 | 2026 Mar 10 12:25:39 | 74.0265 | 0.00503 | 15.8930 | 354.0441 | 91.4110 | 12.54676 | – |
| 2026 Mar 10 18:56 | 2026 Mar 10 12:25:39 | 74.0265 | 0.00503 | 15.8930 | 354.0441 | 91.4110 | 12.54676 | – |
| 2026 Mar 09 18:56 | 2026 Mar 04 12:54:40 | 74.0259 | 0.00502 | 16.4276 | 3.1666 | 91.4110 | 12.54676 | – |
| 2026 Mar 08 18:57 | 2026 Mar 04 12:54:40 | 74.0259 | 0.00502 | 16.4276 | 3.1666 | 91.4110 | 12.54676 | – |
| 2026 Mar 07 18:57 | 2026 Mar 04 12:54:40 | 74.0259 | 0.00502 | 16.4276 | 3.1666 | 91.4110 | 12.54676 | – |
| 2026 Mar 06 18:56 | 2026 Mar 04 12:54:40 | 74.0259 | 0.00502 | 16.4276 | 3.1666 | 91.4110 | 12.54676 | – |
| 2026 Mar 05 18:56 | 2026 Mar 04 12:54:40 | 74.0259 | 0.00502 | 16.4276 | 3.1666 | 91.4110 | 12.54676 | – |
| 2026 Mar 04 18:57 | 2026 Mar 04 12:54:40 | 74.0259 | 0.00502 | 16.4276 | 3.1666 | 91.4110 | 12.54676 | – |