Orbital elements of COSMOS 1721
| Launched | 8 January 1986 |
| Flight ended | – |
| Launch site | Plesetsk Missile and Space Complex, Russia |
| Owner | Commonwealth of Independent States (former USSR) |
| NORAD ID | 16454 |
| 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 May 24 17:57 | 2026 May 21 00:56:13 | 73.9894 | 0.00368 | 15.7190 | 249.5173 | 283.3242 | 12.52386 | – |
| 2026 May 23 17:58 | 2026 May 21 00:56:13 | 73.9894 | 0.00368 | 15.7190 | 249.5173 | 283.3242 | 12.52386 | – |
| 2026 May 22 17:57 | 2026 May 21 00:56:13 | 73.9894 | 0.00368 | 15.7190 | 249.5173 | 283.3242 | 12.52386 | – |
| 2026 May 21 17:57 | 2026 May 21 00:56:13 | 73.9894 | 0.00368 | 15.7190 | 249.5173 | 283.3242 | 12.52386 | – |
| 2026 May 20 17:57 | 2026 May 16 12:43:44 | 73.9885 | 0.00368 | 16.1212 | 256.1890 | 283.3242 | 12.52386 | – |
| 2026 May 19 17:58 | 2026 May 16 12:43:44 | 73.9885 | 0.00368 | 16.1212 | 256.1890 | 283.3242 | 12.52386 | – |
| 2026 May 18 17:57 | 2026 May 16 12:43:44 | 73.9885 | 0.00368 | 16.1212 | 256.1890 | 283.3242 | 12.52386 | – |
| 2026 May 17 17:57 | 2026 May 16 12:43:44 | 73.9885 | 0.00368 | 16.1212 | 256.1890 | 283.3242 | 12.52386 | – |
| 2026 May 16 17:56 | 2026 May 16 12:43:44 | 73.9885 | 0.00368 | 16.1212 | 256.1890 | 283.3242 | 12.52386 | – |
| 2026 May 15 17:57 | 2026 May 10 11:20:10 | 73.9891 | 0.00367 | 16.6616 | 265.1735 | 283.3242 | 12.52386 | – |
| 2026 May 14 17:58 | 2026 May 10 11:20:10 | 73.9891 | 0.00367 | 16.6616 | 265.1735 | 283.3242 | 12.52386 | – |
| 2026 May 13 17:58 | 2026 May 10 11:20:10 | 73.9891 | 0.00367 | 16.6616 | 265.1735 | 283.3242 | 12.52386 | – |
| 2026 May 12 17:58 | 2026 May 10 11:20:10 | 73.9891 | 0.00367 | 16.6616 | 265.1735 | 283.3242 | 12.52386 | – |
| 2026 May 11 17:56 | 2026 May 10 11:20:10 | 73.9891 | 0.00367 | 16.6616 | 265.1735 | 283.3242 | 12.52386 | – |
| 2026 May 10 17:57 | 2026 May 10 11:20:10 | 73.9891 | 0.00367 | 16.6616 | 265.1735 | 283.3242 | 12.52386 | – |
| 2026 May 09 17:57 | 2026 May 05 10:30:52 | 73.9886 | 0.00367 | 17.1107 | 272.6354 | 283.3242 | 12.52386 | – |
| 2026 May 08 17:57 | 2026 May 05 10:30:52 | 73.9886 | 0.00367 | 17.1107 | 272.6354 | 283.3242 | 12.52386 | – |
| 2026 May 07 17:58 | 2026 May 05 10:30:52 | 73.9886 | 0.00367 | 17.1107 | 272.6354 | 283.3242 | 12.52386 | – |
| 2026 May 06 17:57 | 2026 May 05 10:30:52 | 73.9886 | 0.00367 | 17.1107 | 272.6354 | 283.3242 | 12.52386 | – |
| 2026 May 05 17:57 | 2026 May 05 10:30:52 | 73.9886 | 0.00367 | 17.1107 | 272.6354 | 283.3242 | 12.52386 | – |
| 2026 May 04 17:57 | 2026 Apr 30 11:43:26 | 73.9880 | 0.00367 | 17.5523 | 279.9684 | 283.3242 | 12.52386 | – |
| 2026 May 03 17:57 | 2026 Apr 30 11:43:26 | 73.9880 | 0.00367 | 17.5523 | 279.9684 | 283.3242 | 12.52386 | – |
| 2026 May 02 17:57 | 2026 Apr 30 11:43:26 | 73.9880 | 0.00367 | 17.5523 | 279.9684 | 283.3242 | 12.52386 | – |
| 2026 May 01 17:56 | 2026 Apr 30 11:43:26 | 73.9880 | 0.00367 | 17.5523 | 279.9684 | 283.3242 | 12.52386 | – |
| 2026 Apr 30 17:56 | 2026 Apr 30 11:43:26 | 73.9880 | 0.00367 | 17.5523 | 279.9684 | 283.3242 | 12.52386 | – |
| 2026 Apr 29 17:57 | 2026 Apr 24 11:52:57 | 73.9873 | 0.00367 | 18.0870 | 288.8761 | 283.3242 | 12.52386 | – |
| 2026 Apr 28 17:56 | 2026 Apr 24 11:52:57 | 73.9873 | 0.00367 | 18.0870 | 288.8761 | 283.3242 | 12.52386 | – |
| 2026 Apr 27 17:58 | 2026 Apr 24 11:52:57 | 73.9873 | 0.00367 | 18.0870 | 288.8761 | 283.3242 | 12.52386 | – |