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 Sep 15 17:56 | 2025 Sep 15 00:45:32 | 82.5605 | 0.00011 | 7.6045 | 318.1890 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 12 17:57 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 11 17:57 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 10 17:56 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 08 17:57 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 07 17:56 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 06 20:41 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 03 17:57 | 2025 Sep 03 03:48:37 | 82.5627 | 0.00016 | 8.1119 | 352.0789 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 02 17:56 | 2025 Aug 27 22:45:05 | 82.5638 | 0.00019 | 8.3773 | 4.9238 | 196.2645 | 12.63654 | 7.743 |
| 2025 Sep 01 17:56 | 2025 Aug 27 22:45:05 | 82.5638 | 0.00019 | 8.3773 | 4.9238 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 31 17:56 | 2025 Aug 27 22:45:05 | 82.5638 | 0.00019 | 8.3773 | 4.9238 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 30 17:56 | 2025 Aug 27 22:45:05 | 82.5638 | 0.00019 | 8.3773 | 4.9238 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 29 17:56 | 2025 Aug 27 22:45:05 | 82.5638 | 0.00019 | 8.3773 | 4.9238 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 28 17:57 | 2025 Aug 27 22:45:05 | 82.5638 | 0.00019 | 8.3773 | 4.9238 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 27 17:56 | 2025 Aug 23 05:18:30 | 82.5645 | 0.00021 | 8.5792 | 14.6832 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 26 17:56 | 2025 Aug 23 05:18:30 | 82.5645 | 0.00021 | 8.5792 | 14.6832 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 25 17:56 | 2025 Aug 23 05:18:30 | 82.5645 | 0.00021 | 8.5792 | 14.6832 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 24 17:56 | 2025 Aug 23 05:18:30 | 82.5645 | 0.00021 | 8.5792 | 14.6832 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 23 17:56 | 2025 Aug 23 05:18:30 | 82.5645 | 0.00021 | 8.5792 | 14.6832 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 22 17:56 | 2025 Aug 17 23:19:48 | 82.5653 | 0.00023 | 8.8034 | 23.4397 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 20 17:56 | 2025 Aug 17 23:19:48 | 82.5653 | 0.00023 | 8.8034 | 23.4397 | 196.2645 | 12.63654 | 7.743 |
| 2025 Aug 19 17:56 | 2025 Aug 17 23:19:48 | 82.5653 | 0.00023 | 8.8034 | 23.4397 | 196.2645 | 12.63654 | 7.743 |