| Official name | COSMOS 2491 |
| Alternative name | Cosmos 2491 (RS 46) |
| Cospar ID | 2013-076E |
| Norad ID | 39497 |
| Launch date | 2013-12-25 |
| Launch site | PKMTR |
| Launch vehicle | Rokot-KM |
| RCS size | MEDIUM |
| Decay date | ON ORBIT |
| Period (min) | 115.8 |
| Inclination (deg) | 82.48 |
| Perigee (km) | 1482 |
| Apogee (km) | 1501 |
| Eccentricity | 0.00636942675159236 |
| Mean motion (revs. per day) | 12.4352331606218 |
| Semi-Major axis (km) | 7869.635 |
| Raan (deg) | 274.8073 |
| Arg of perigee (deg) | 282.2966 |
| Shape | Hex Box |
| Mass (kg) | 50 |
| Height (m) | 1 |
| Width (m) | 0.4 |
| Depth (m) | 1 |
| Span (m^2) | 1 |
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