Orbital elements of COSMOS 877
| Launched | 6 December 1976 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 9594 |
| 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 13 18:57 | 2026 Mar 10 09:57:33 | 74.0310 | 0.00060 | 2.7713 | 353.0256 | 127.8884 | 12.51339 | – |
| 2026 Mar 12 18:57 | 2026 Mar 10 09:57:33 | 74.0310 | 0.00060 | 2.7713 | 353.0256 | 127.8884 | 12.51339 | – |
| 2026 Mar 11 18:56 | 2026 Mar 10 09:57:33 | 74.0310 | 0.00060 | 2.7713 | 353.0256 | 127.8884 | 12.51339 | – |
| 2026 Mar 10 18:56 | 2026 Mar 10 09:57:33 | 74.0310 | 0.00060 | 2.7713 | 353.0256 | 127.8884 | 12.51339 | – |
| 2026 Mar 09 18:56 | 2026 Mar 04 15:48:23 | 74.0298 | 0.00059 | 3.2826 | 1.5212 | 127.8884 | 12.51339 | – |
| 2026 Mar 08 18:57 | 2026 Mar 04 15:48:23 | 74.0298 | 0.00059 | 3.2826 | 1.5212 | 127.8884 | 12.51339 | – |
| 2026 Mar 07 18:57 | 2026 Mar 04 15:48:23 | 74.0298 | 0.00059 | 3.2826 | 1.5212 | 127.8884 | 12.51339 | – |
| 2026 Mar 06 18:56 | 2026 Mar 04 15:48:23 | 74.0298 | 0.00059 | 3.2826 | 1.5212 | 127.8884 | 12.51339 | – |
| 2026 Mar 05 18:56 | 2026 Mar 04 15:48:23 | 74.0298 | 0.00059 | 3.2826 | 1.5212 | 127.8884 | 12.51339 | – |
| 2026 Mar 04 18:57 | 2026 Mar 04 15:48:23 | 74.0298 | 0.00059 | 3.2826 | 1.5212 | 127.8884 | 12.51339 | – |
| 2026 Mar 03 18:56 | 2026 Feb 26 10:06:54 | 74.0287 | 0.00058 | 3.8366 | 10.9563 | 127.8884 | 12.51339 | – |
| 2026 Mar 02 18:57 | 2026 Feb 26 10:06:54 | 74.0287 | 0.00058 | 3.8366 | 10.9563 | 127.8884 | 12.51339 | – |
| 2026 Mar 01 18:57 | 2026 Feb 26 10:06:54 | 74.0287 | 0.00058 | 3.8366 | 10.9563 | 127.8884 | 12.51339 | – |
| 2026 Feb 28 18:56 | 2026 Feb 26 10:06:54 | 74.0287 | 0.00058 | 3.8366 | 10.9563 | 127.8884 | 12.51339 | – |
| 2026 Feb 27 19:05 | 2026 Feb 26 10:06:54 | 74.0287 | 0.00058 | 3.8366 | 10.9563 | 127.8884 | 12.51339 | – |
| 2026 Feb 26 20:45 | 2026 Feb 26 10:06:54 | 74.0287 | 0.00058 | 3.8366 | 10.9563 | 127.8884 | 12.51339 | – |