Orbital elements of COSMOS 1877
| Launched | 6 September 1987 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 18336 |
| 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 Dec 28 18:57 | 2025 Dec 26 08:57:33 | 82.5635 | 0.00026 | 3.2305 | 75.9551 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 27 18:57 | 2025 Dec 26 08:57:33 | 82.5635 | 0.00026 | 3.2305 | 75.9551 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 26 18:56 | 2025 Dec 26 08:57:33 | 82.5635 | 0.00026 | 3.2305 | 75.9551 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 25 18:57 | 2025 Dec 20 15:00:19 | 82.5641 | 0.00027 | 3.4762 | 84.6461 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 24 18:56 | 2025 Dec 20 15:00:19 | 82.5641 | 0.00027 | 3.4762 | 84.6461 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 23 18:56 | 2025 Dec 20 15:00:19 | 82.5641 | 0.00027 | 3.4762 | 84.6461 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 22 18:57 | 2025 Dec 20 15:00:19 | 82.5641 | 0.00027 | 3.4762 | 84.6461 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 21 18:57 | 2025 Dec 20 15:00:19 | 82.5641 | 0.00027 | 3.4762 | 84.6461 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 20 18:57 | 2025 Dec 20 15:00:19 | 82.5641 | 0.00027 | 3.4762 | 84.6461 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 19 18:57 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 18 18:57 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 17 18:58 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 16 18:57 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 15 18:58 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 14 18:56 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 13 18:56 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 12 18:57 | 2025 Dec 12 07:00:07 | 82.5648 | 0.00028 | 3.8323 | 96.7379 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 11 18:56 | 2025 Dec 07 05:12:06 | 82.5649 | 0.00027 | 4.0491 | 103.7768 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 10 18:56 | 2025 Dec 07 05:12:06 | 82.5649 | 0.00027 | 4.0491 | 103.7768 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 09 18:56 | 2025 Dec 07 05:12:06 | 82.5649 | 0.00027 | 4.0491 | 103.7768 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 08 18:56 | 2025 Dec 07 05:12:06 | 82.5649 | 0.00027 | 4.0491 | 103.7768 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 07 18:56 | 2025 Dec 07 05:12:06 | 82.5649 | 0.00027 | 4.0491 | 103.7768 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 06 18:56 | 2025 Dec 02 07:36:13 | 82.5650 | 0.00027 | 4.2585 | 110.7718 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 05 18:57 | 2025 Dec 02 07:36:13 | 82.5650 | 0.00027 | 4.2585 | 110.7718 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 04 18:57 | 2025 Dec 02 07:36:13 | 82.5650 | 0.00027 | 4.2585 | 110.7718 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 03 18:56 | 2025 Dec 02 07:36:13 | 82.5650 | 0.00027 | 4.2585 | 110.7718 | 295.5515 | 12.63660 | 7.743 |
| 2025 Dec 02 18:56 | 2025 Dec 02 07:36:13 | 82.5650 | 0.00027 | 4.2585 | 110.7718 | 295.5515 | 12.63660 | 7.743 |