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 |
| 2025 Jun 30 17:56 | 2025 Jun 28 15:09:41 | 74.0313 | 0.00060 | 1.3986 | 22.5362 | 52.5301 | 12.51333 | – |
| 2025 Jun 29 17:56 | 2025 Jun 28 15:09:41 | 74.0313 | 0.00060 | 1.3986 | 22.5362 | 52.5301 | 12.51333 | – |
| 2025 Jun 28 17:56 | 2025 Jun 28 15:09:41 | 74.0313 | 0.00060 | 1.3986 | 22.5362 | 52.5301 | 12.51333 | – |
| 2025 Jun 27 17:56 | 2025 Jun 22 13:01:35 | 74.0315 | 0.00059 | 1.9395 | 32.2908 | 52.5301 | 12.51333 | – |
| 2025 Jun 26 17:56 | 2025 Jun 22 13:01:35 | 74.0315 | 0.00059 | 1.9395 | 32.2908 | 52.5301 | 12.51333 | – |
| 2025 Jun 25 17:56 | 2025 Jun 22 13:01:35 | 74.0315 | 0.00059 | 1.9395 | 32.2908 | 52.5301 | 12.51333 | – |
| 2025 Jun 24 17:56 | 2025 Jun 22 13:01:35 | 74.0315 | 0.00059 | 1.9395 | 32.2908 | 52.5301 | 12.51333 | – |
| 2025 Jun 23 17:56 | 2025 Jun 22 13:01:35 | 74.0315 | 0.00059 | 1.9395 | 32.2908 | 52.5301 | 12.51333 | – |
| 2025 Jun 22 17:56 | 2025 Jun 16 22:42:45 | 74.0319 | 0.00059 | 2.4365 | 40.8096 | 52.5301 | 12.51333 | – |
| 2025 Jun 21 17:56 | 2025 Jun 16 22:42:45 | 74.0319 | 0.00059 | 2.4365 | 40.8096 | 52.5301 | 12.51333 | – |
| 2025 Jun 20 17:57 | 2025 Jun 16 22:42:45 | 74.0319 | 0.00059 | 2.4365 | 40.8096 | 52.5301 | 12.51333 | – |
| 2025 Jun 19 17:56 | 2025 Jun 16 22:42:45 | 74.0319 | 0.00059 | 2.4365 | 40.8096 | 52.5301 | 12.51333 | – |
| 2025 Jun 18 17:56 | 2025 Jun 16 22:42:45 | 74.0319 | 0.00059 | 2.4365 | 40.8096 | 52.5301 | 12.51333 | – |
| 2025 Jun 17 17:56 | 2025 Jun 16 22:42:45 | 74.0319 | 0.00059 | 2.4365 | 40.8096 | 52.5301 | 12.51333 | – |
| 2025 Jun 16 17:56 | 2025 Jun 12 02:25:13 | 74.0323 | 0.00058 | 2.8668 | 48.4446 | 52.5301 | 12.51333 | – |
| 2025 Jun 15 17:56 | 2025 Jun 12 02:25:13 | 74.0323 | 0.00058 | 2.8668 | 48.4446 | 52.5301 | 12.51333 | – |
| 2025 Jun 14 17:56 | 2025 Jun 12 02:25:13 | 74.0323 | 0.00058 | 2.8668 | 48.4446 | 52.5301 | 12.51333 | – |
| 2025 Jun 13 17:56 | 2025 Jun 12 02:25:13 | 74.0323 | 0.00058 | 2.8668 | 48.4446 | 52.5301 | 12.51333 | – |
| 2025 Jun 12 17:56 | 2025 Jun 12 02:25:13 | 74.0323 | 0.00058 | 2.8668 | 48.4446 | 52.5301 | 12.51333 | – |
| 2025 Jun 11 17:56 | 2025 Jun 05 18:20:59 | 74.0323 | 0.00057 | 3.4295 | 58.5622 | 52.5301 | 12.51333 | – |
| 2025 Jun 10 17:56 | 2025 Jun 05 18:20:59 | 74.0323 | 0.00057 | 3.4295 | 58.5622 | 52.5301 | 12.51333 | – |
| 2025 Jun 09 17:56 | 2025 Jun 05 18:20:59 | 74.0323 | 0.00057 | 3.4295 | 58.5622 | 52.5301 | 12.51333 | – |
| 2025 Jun 08 17:56 | 2025 Jun 05 18:20:59 | 74.0323 | 0.00057 | 3.4295 | 58.5622 | 52.5301 | 12.51333 | – |
| 2025 Jun 07 17:56 | 2025 Jun 05 18:20:59 | 74.0323 | 0.00057 | 3.4295 | 58.5622 | 52.5301 | 12.51333 | – |
| 2025 Jun 06 17:56 | 2025 Jun 05 18:20:59 | 74.0323 | 0.00057 | 3.4295 | 58.5622 | 52.5301 | 12.51333 | – |
| 2025 Jun 05 17:56 | 2025 Jun 01 11:21:51 | 74.0323 | 0.00057 | 3.8106 | 65.5780 | 52.5301 | 12.51333 | – |
| 2025 Jun 04 17:57 | 2025 Jun 01 11:21:51 | 74.0323 | 0.00057 | 3.8106 | 65.5780 | 52.5301 | 12.51333 | – |
| 2025 Jun 03 17:57 | 2025 Jun 01 11:21:51 | 74.0323 | 0.00057 | 3.8106 | 65.5780 | 52.5301 | 12.51333 | – |