Orbital elements of COSMOS 977
| Launched | 9 January 1978 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 10584 |
| 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 21 03:24:23 | 74.0332 | 0.00408 | 1.0853 | 144.1566 | 14.1631 | 12.57990 | – |
| 2026 May 24 17:57 | 2026 May 21 03:24:23 | 74.0332 | 0.00408 | 1.0853 | 144.1566 | 14.1631 | 12.57990 | – |
| 2026 May 23 17:58 | 2026 May 21 03:24:23 | 74.0332 | 0.00408 | 1.0853 | 144.1566 | 14.1631 | 12.57990 | – |
| 2026 May 22 17:57 | 2026 May 21 03:24:23 | 74.0332 | 0.00408 | 1.0853 | 144.1566 | 14.1631 | 12.57990 | – |
| 2026 May 21 17:57 | 2026 May 21 03:24:23 | 74.0332 | 0.00408 | 1.0853 | 144.1566 | 14.1631 | 12.57990 | – |
| 2026 May 20 17:57 | 2026 May 16 10:52:54 | 74.0334 | 0.00408 | 1.5068 | 151.3852 | 14.1631 | 12.57990 | – |
| 2026 May 19 17:58 | 2026 May 16 10:52:54 | 74.0334 | 0.00408 | 1.5068 | 151.3852 | 14.1631 | 12.57990 | – |
| 2026 May 18 17:57 | 2026 May 16 10:52:54 | 74.0334 | 0.00408 | 1.5068 | 151.3852 | 14.1631 | 12.57990 | – |
| 2026 May 17 17:57 | 2026 May 16 10:52:54 | 74.0334 | 0.00408 | 1.5068 | 151.3852 | 14.1631 | 12.57990 | – |
| 2026 May 16 17:56 | 2026 May 16 10:52:54 | 74.0334 | 0.00408 | 1.5068 | 151.3852 | 14.1631 | 12.57990 | – |
| 2026 May 15 17:57 | 2026 May 10 11:45:22 | 74.0338 | 0.00409 | 2.0430 | 160.5872 | 14.1631 | 12.57990 | – |
| 2026 May 14 17:58 | 2026 May 10 11:45:22 | 74.0338 | 0.00409 | 2.0430 | 160.5872 | 14.1631 | 12.57990 | – |
| 2026 May 13 17:58 | 2026 May 10 11:45:22 | 74.0338 | 0.00409 | 2.0430 | 160.5872 | 14.1631 | 12.57990 | – |
| 2026 May 12 17:58 | 2026 May 10 11:45:22 | 74.0338 | 0.00409 | 2.0430 | 160.5872 | 14.1631 | 12.57990 | – |
| 2026 May 11 17:56 | 2026 May 10 11:45:22 | 74.0338 | 0.00409 | 2.0430 | 160.5872 | 14.1631 | 12.57990 | – |
| 2026 May 10 17:57 | 2026 May 10 11:45:22 | 74.0338 | 0.00409 | 2.0430 | 160.5872 | 14.1631 | 12.57990 | – |
| 2026 May 09 17:57 | 2026 May 05 11:31:24 | 74.0337 | 0.00410 | 2.4934 | 168.2832 | 14.1631 | 12.57990 | – |
| 2026 May 08 17:57 | 2026 May 05 11:31:24 | 74.0337 | 0.00410 | 2.4934 | 168.2832 | 14.1631 | 12.57990 | – |
| 2026 May 07 17:58 | 2026 May 05 11:31:24 | 74.0337 | 0.00410 | 2.4934 | 168.2832 | 14.1631 | 12.57990 | – |
| 2026 May 06 17:57 | 2026 May 05 11:31:24 | 74.0337 | 0.00410 | 2.4934 | 168.2832 | 14.1631 | 12.57990 | – |
| 2026 May 05 17:57 | 2026 May 05 11:31:24 | 74.0337 | 0.00410 | 2.4934 | 168.2832 | 14.1631 | 12.57990 | – |
| 2026 May 04 17:57 | 2026 Apr 30 13:11:55 | 74.0334 | 0.00411 | 2.9366 | 175.8782 | 14.1631 | 12.57990 | – |
| 2026 May 03 17:57 | 2026 Apr 30 13:11:55 | 74.0334 | 0.00411 | 2.9366 | 175.8782 | 14.1631 | 12.57990 | – |
| 2026 May 02 17:57 | 2026 Apr 30 13:11:55 | 74.0334 | 0.00411 | 2.9366 | 175.8782 | 14.1631 | 12.57990 | – |
| 2026 May 01 17:56 | 2026 Apr 30 13:11:55 | 74.0334 | 0.00411 | 2.9366 | 175.8782 | 14.1631 | 12.57990 | – |
| 2026 Apr 30 17:56 | 2026 Apr 30 13:11:55 | 74.0334 | 0.00411 | 2.9366 | 175.8782 | 14.1631 | 12.57990 | – |
| 2026 Apr 29 17:57 | 2026 Apr 24 06:08:04 | 74.0324 | 0.00412 | 3.5025 | 185.5058 | 14.1631 | 12.57990 | – |
| 2026 Apr 28 17:56 | 2026 Apr 24 06:08:04 | 74.0324 | 0.00412 | 3.5025 | 185.5058 | 14.1631 | 12.57990 | – |