Glonass 721 (Cosmos 2435) – a series of spacecraft of the Russian global navigation system GLONASS of the 2nd generation, developed and produced by ISS named after Academician M.F. It is Reshetnev.
| Name of Satellite | Glonass 721 (Cosmos 2435) |
| Purpose | Navigation/Global Positioning |
| Contractor | ISS Reshetnev |
| Country of Contractor | Russia |
| Launch Mass (kg.) | 1 480 |
| Class of Orbit | MEO |
| Perigee (km) | 19 142 |
| Expected Lifetime (yrs.) | 7 |
| Date of Launch | 25.12.2007 |
| Launch Site | Baikonur Cosmodrome |
| Launch Vehicle | Proton M |
| COSPAR Number | 2007-065A |
| NORAD Number | 32393 |
Glonass 721 is distinct from satellites of the ‘Glonass’ series (1st generation) in that it has a fixed period of active existence of 7 years. In contrast to the previous satellites, these new satellites emit two signals for civilian consumers, which greatly enhances location accuracy.
