| Official name | SL-12 R/B(AUX MOTOR) |
| Alternative name | Proton-K/DM-2 ullage motor (SOZ) |
| Cospar ID | 1985-037H |
| Norad ID | 15715 |
| Launch date | 1985-05-17 |
| Launch site | TTMTR |
| Launch vehicle | Proton-K Blok-DM-2 |
| RCS size | MEDIUM |
| Decay date | ON ORBIT |
| Period (min) | 259.52 |
| Inclination (deg) | 52 |
| Perigee (km) | 337 |
| Apogee (km) | 13862 |
| Eccentricity | 0.95253186844144 |
| Mean motion (revs. per day) | 5.54870530209618 |
| Semi-Major axis (km) | 13477.635 |
| Raan (deg) | 63.8557 |
| Arg of perigee (deg) | 59.0404 |
| Shape | Cyl |
| Mass (kg) | 55.5 |
| Diameter (m) | 0.6 |
| Height (m) | 1.1 |
| Span (m^2) | 1.1 |
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