| Official name | SL-12 R/B(2) |
| Alternative name | Blok-DM (Proton-K/DM) |
| Cospar ID | 1985-016F |
| Norad ID | 15581 |
| Launch date | 1985-02-21 |
| Launch site | TTMTR |
| Launch vehicle | Proton-K Blok-DM |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 1448.66 |
| Inclination (deg) | 10.34 |
| Perigee (km) | 35926 |
| Apogee (km) | 36139 |
| Eccentricity | 0.00295566502463054 |
| Mean motion (revs. per day) | 0.994022061767426 |
| Semi-Major axis (km) | 42410.635 |
| Raan (deg) | 318.8226 |
| Arg of perigee (deg) | 243.9321 |
| Shape | Cyl |
| Mass (kg) | 2120.91 |
| Diameter (m) | 3.7 |
| Height (m) | 6.27 |
| Span (m^2) | 6.27 |
