Satellite
Etalon
Satellite specification
| ADCS type | unoriented |
| Mass | 1345 kg |
| Orbit | High-mid, circular, inclined |
| Orbit height | 19100 km |
| Launch vehicle | Rokot carrier rocket and DM upper stage |
| Cosmodromes | Baikonur |
First launch date 10 January 1989