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 Jul 03 17:57 | 2026 Jun 29 12:43:14 | 74.0301 | 0.00062 | 16.9034 | 198.9149 | 268.0918 | 12.51340 | – |
| 2026 Jul 02 17:56 | 2026 Jun 29 12:43:14 | 74.0301 | 0.00062 | 16.9034 | 198.9149 | 268.0918 | 12.51340 | – |
| 2026 Jul 01 17:56 | 2026 Jun 29 12:43:14 | 74.0301 | 0.00062 | 16.9034 | 198.9149 | 268.0918 | 12.51340 | – |
| 2026 Jun 30 17:56 | 2026 Jun 29 12:43:14 | 74.0301 | 0.00062 | 16.9034 | 198.9149 | 268.0918 | 12.51340 | – |
| 2026 Jun 29 17:57 | 2026 Jun 29 12:43:14 | 74.0301 | 0.00062 | 16.9034 | 198.9149 | 268.0918 | 12.51340 | – |
| 2026 Jun 28 17:56 | 2026 Jun 22 17:27:59 | 74.0308 | 0.00063 | 17.5074 | 208.4960 | 268.0918 | 12.51340 | – |
| 2026 Jun 27 17:55 | 2026 Jun 22 17:27:59 | 74.0308 | 0.00063 | 17.5074 | 208.4960 | 268.0918 | 12.51340 | – |
| 2026 Jun 26 17:56 | 2026 Jun 22 17:27:59 | 74.0308 | 0.00063 | 17.5074 | 208.4960 | 268.0918 | 12.51340 | – |
| 2026 Jun 25 17:56 | 2026 Jun 22 17:27:59 | 74.0308 | 0.00063 | 17.5074 | 208.4960 | 268.0918 | 12.51340 | – |
| 2026 Jun 24 17:55 | 2026 Jun 22 17:27:59 | 74.0308 | 0.00063 | 17.5074 | 208.4960 | 268.0918 | 12.51340 | – |
| 2026 Jun 23 17:56 | 2026 Jun 22 17:27:59 | 74.0308 | 0.00063 | 17.5074 | 208.4960 | 268.0918 | 12.51340 | – |
| 2026 Jun 22 17:56 | 2026 Jun 17 14:50:08 | 74.0311 | 0.00063 | 17.9612 | 215.5835 | 268.0918 | 12.51340 | – |
| 2026 Jun 21 17:57 | 2026 Jun 17 14:50:08 | 74.0311 | 0.00063 | 17.9612 | 215.5835 | 268.0918 | 12.51340 | – |
| 2026 Jun 20 17:56 | 2026 Jun 17 14:50:08 | 74.0311 | 0.00063 | 17.9612 | 215.5835 | 268.0918 | 12.51340 | – |
| 2026 Jun 19 17:57 | 2026 Jun 17 14:50:08 | 74.0311 | 0.00063 | 17.9612 | 215.5835 | 268.0918 | 12.51340 | – |
| 2026 Jun 18 17:56 | 2026 Jun 17 14:50:08 | 74.0311 | 0.00063 | 17.9612 | 215.5835 | 268.0918 | 12.51340 | – |
| 2026 Jun 17 17:57 | 2026 Jun 17 14:50:08 | 74.0311 | 0.00063 | 17.9612 | 215.5835 | 268.0918 | 12.51340 | – |
| 2026 Jun 16 17:55 | 2026 Jun 11 18:51:28 | 74.0312 | 0.00064 | 18.4791 | 223.6832 | 268.0918 | 12.51340 | – |
| 2026 Jun 15 17:56 | 2026 Jun 11 18:51:28 | 74.0312 | 0.00064 | 18.4791 | 223.6832 | 268.0918 | 12.51340 | – |
| 2026 Jun 14 17:57 | 2026 Jun 11 18:51:28 | 74.0312 | 0.00064 | 18.4791 | 223.6832 | 268.0918 | 12.51340 | – |
| 2026 Jun 13 17:56 | 2026 Jun 11 18:51:28 | 74.0312 | 0.00064 | 18.4791 | 223.6832 | 268.0918 | 12.51340 | – |
| 2026 Jun 12 17:56 | 2026 Jun 11 18:51:28 | 74.0312 | 0.00064 | 18.4791 | 223.6832 | 268.0918 | 12.51340 | – |
| 2026 Jun 11 17:57 | 2026 Jun 07 01:57:14 | 74.0311 | 0.00064 | 18.8969 | 230.2079 | 268.0918 | 12.51340 | – |
| 2026 Jun 10 17:56 | 2026 Jun 07 01:57:14 | 74.0311 | 0.00064 | 18.8969 | 230.2079 | 268.0918 | 12.51340 | – |
| 2026 Jun 09 17:57 | 2026 Jun 07 01:57:14 | 74.0311 | 0.00064 | 18.8969 | 230.2079 | 268.0918 | 12.51340 | – |
| 2026 Jun 08 17:56 | 2026 Jun 07 01:57:14 | 74.0311 | 0.00064 | 18.8969 | 230.2079 | 268.0918 | 12.51340 | – |
| 2026 Jun 07 17:56 | 2026 Jun 07 01:57:14 | 74.0311 | 0.00064 | 18.8969 | 230.2079 | 268.0918 | 12.51340 | – |
| 2026 Jun 06 17:56 | 2026 May 31 12:03:01 | 74.0307 | 0.00064 | 19.4812 | 239.3767 | 268.0918 | 12.51340 | – |