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 Aug 25 17:56 | 2026 Aug 25 08:30:29 | 73.9874 | 0.00358 | 7.1273 | 104.2782 | 10.6227 | 12.52387 | – |
| 2026 Aug 24 17:57 | 2026 Aug 19 02:45:23 | 73.9884 | 0.00358 | 7.6840 | 113.8465 | 10.6227 | 12.52387 | – |
| 2026 Aug 23 17:56 | 2026 Aug 19 02:45:23 | 73.9884 | 0.00358 | 7.6840 | 113.8465 | 10.6227 | 12.52387 | – |
| 2026 Aug 22 17:56 | 2026 Aug 19 02:45:23 | 73.9884 | 0.00358 | 7.6840 | 113.8465 | 10.6227 | 12.52387 | – |
| 2026 Aug 21 17:56 | 2026 Aug 19 02:45:23 | 73.9884 | 0.00358 | 7.6840 | 113.8465 | 10.6227 | 12.52387 | – |
| 2026 Aug 20 17:57 | 2026 Aug 19 02:45:23 | 73.9884 | 0.00358 | 7.6840 | 113.8465 | 10.6227 | 12.52387 | – |
| 2026 Aug 19 17:57 | 2026 Aug 19 02:45:23 | 73.9884 | 0.00358 | 7.6840 | 113.8465 | 10.6227 | 12.52387 | – |
| 2026 Aug 18 17:56 | 2026 Aug 13 05:26:18 | 73.9890 | 0.00358 | 8.2092 | 122.8500 | 10.6227 | 12.52387 | – |
| 2026 Aug 17 17:56 | 2026 Aug 13 05:26:18 | 73.9890 | 0.00358 | 8.2092 | 122.8500 | 10.6227 | 12.52387 | – |
| 2026 Aug 16 17:56 | 2026 Aug 13 05:26:18 | 73.9890 | 0.00358 | 8.2092 | 122.8500 | 10.6227 | 12.52387 | – |
| 2026 Aug 15 17:57 | 2026 Aug 13 05:26:18 | 73.9890 | 0.00358 | 8.2092 | 122.8500 | 10.6227 | 12.52387 | – |
| 2026 Aug 14 17:56 | 2026 Aug 13 05:26:18 | 73.9890 | 0.00358 | 8.2092 | 122.8500 | 10.6227 | 12.52387 | – |
| 2026 Aug 13 17:57 | 2026 Aug 13 05:26:18 | 73.9890 | 0.00358 | 8.2092 | 122.8500 | 10.6227 | 12.52387 | – |
| 2026 Aug 12 17:56 | 2026 Aug 07 05:20:46 | 73.9897 | 0.00359 | 8.7448 | 132.0307 | 10.6227 | 12.52387 | – |
| 2026 Aug 11 17:56 | 2026 Aug 07 05:20:46 | 73.9897 | 0.00359 | 8.7448 | 132.0307 | 10.6227 | 12.52387 | – |
| 2026 Aug 10 17:56 | 2026 Aug 07 05:20:46 | 73.9897 | 0.00359 | 8.7448 | 132.0307 | 10.6227 | 12.52387 | – |
| 2026 Aug 09 17:57 | 2026 Aug 07 05:20:46 | 73.9897 | 0.00359 | 8.7448 | 132.0307 | 10.6227 | 12.52387 | – |
| 2026 Aug 08 17:57 | 2026 Aug 07 05:20:46 | 73.9897 | 0.00359 | 8.7448 | 132.0307 | 10.6227 | 12.52387 | – |
| 2026 Aug 07 17:57 | 2026 Aug 07 05:20:46 | 73.9897 | 0.00359 | 8.7448 | 132.0307 | 10.6227 | 12.52387 | – |
| 2026 Aug 06 17:57 | 2026 Aug 01 05:33:47 | 73.9896 | 0.00359 | 9.2791 | 141.2266 | 10.6227 | 12.52387 | – |
| 2026 Aug 05 17:56 | 2026 Aug 01 05:33:47 | 73.9896 | 0.00359 | 9.2791 | 141.2266 | 10.6227 | 12.52387 | – |
| 2026 Aug 04 17:57 | 2026 Aug 01 05:33:47 | 73.9896 | 0.00359 | 9.2791 | 141.2266 | 10.6227 | 12.52387 | – |
| 2026 Aug 03 17:56 | 2026 Aug 01 05:33:47 | 73.9896 | 0.00359 | 9.2791 | 141.2266 | 10.6227 | 12.52387 | – |
| 2026 Aug 02 17:57 | 2026 Aug 01 05:33:47 | 73.9896 | 0.00359 | 9.2791 | 141.2266 | 10.6227 | 12.52387 | – |
| 2026 Aug 01 17:57 | 2026 Aug 01 05:33:47 | 73.9896 | 0.00359 | 9.2791 | 141.2266 | 10.6227 | 12.52387 | – |
| 2026 Jul 31 17:56 | 2026 Jul 27 12:30:47 | 73.9894 | 0.00360 | 9.6993 | 148.4245 | 10.6227 | 12.52387 | – |
| 2026 Jul 30 17:57 | 2026 Jul 27 12:30:47 | 73.9894 | 0.00360 | 9.6993 | 148.4245 | 10.6227 | 12.52387 | – |
| 2026 Jul 29 17:57 | 2026 Jul 27 12:30:47 | 73.9894 | 0.00360 | 9.6993 | 148.4245 | 10.6227 | 12.52387 | – |