Orbital elements of COSMOS 684
| Launched | 18 September 1974 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 7442 |
| 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 12 18:57 | 2026 Mar 10 11:21:52 | 74.0360 | 0.00329 | 13.0486 | 330.4904 | 95.7942 | 12.55721 | – |
| 2026 Mar 11 18:56 | 2026 Mar 10 11:21:52 | 74.0360 | 0.00329 | 13.0486 | 330.4904 | 95.7942 | 12.55721 | – |
| 2026 Mar 10 18:56 | 2026 Mar 10 11:21:52 | 74.0360 | 0.00329 | 13.0486 | 330.4904 | 95.7942 | 12.55721 | – |
| 2026 Mar 09 18:56 | 2026 Mar 04 11:57:37 | 74.0348 | 0.00327 | 13.5834 | 339.5754 | 95.7942 | 12.55721 | – |
| 2026 Mar 08 18:57 | 2026 Mar 04 11:57:37 | 74.0348 | 0.00327 | 13.5834 | 339.5754 | 95.7942 | 12.55721 | – |
| 2026 Mar 07 18:57 | 2026 Mar 04 11:57:37 | 74.0348 | 0.00327 | 13.5834 | 339.5754 | 95.7942 | 12.55721 | – |
| 2026 Mar 06 18:56 | 2026 Mar 04 11:57:37 | 74.0348 | 0.00327 | 13.5834 | 339.5754 | 95.7942 | 12.55721 | – |
| 2026 Mar 05 18:56 | 2026 Mar 04 11:57:37 | 74.0348 | 0.00327 | 13.5834 | 339.5754 | 95.7942 | 12.55721 | – |
| 2026 Mar 04 18:57 | 2026 Mar 04 11:57:37 | 74.0348 | 0.00327 | 13.5834 | 339.5754 | 95.7942 | 12.55721 | – |
| 2026 Mar 03 18:56 | 2026 Feb 26 12:36:50 | 74.0338 | 0.00326 | 14.1180 | 348.6147 | 95.7942 | 12.55721 | – |
| 2026 Mar 02 18:57 | 2026 Feb 26 12:36:50 | 74.0338 | 0.00326 | 14.1180 | 348.6147 | 95.7942 | 12.55721 | – |
| 2026 Mar 01 18:57 | 2026 Feb 26 12:36:50 | 74.0338 | 0.00326 | 14.1180 | 348.6147 | 95.7942 | 12.55721 | – |
| 2026 Feb 28 18:56 | 2026 Feb 26 12:36:50 | 74.0338 | 0.00326 | 14.1180 | 348.6147 | 95.7942 | 12.55721 | – |
| 2026 Feb 27 19:05 | 2026 Feb 26 12:36:50 | 74.0338 | 0.00326 | 14.1180 | 348.6147 | 95.7942 | 12.55721 | – |
| 2026 Feb 26 20:45 | 2026 Feb 26 12:36:50 | 74.0338 | 0.00326 | 14.1180 | 348.6147 | 95.7942 | 12.55721 | – |