| Official name | SL-8 R/B |
| Alternative name | Cosmos 3 second stage (S3) (Cosmos 3M (11K65M)) |
| Cospar ID | 1979-078B |
| Norad ID | 11511 |
| Launch date | 1979-08-28 |
| Launch site | PKMTR |
| Launch vehicle | Kosmos-3M |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 100.13 |
| Inclination (deg) | 74.04 |
| Perigee (km) | 753 |
| Apogee (km) | 777 |
| Eccentricity | 0.0156862745098039 |
| Mean motion (revs. per day) | 14.3813043044043 |
| Semi-Major axis (km) | 7143.135 |
| Raan (deg) | 23.7935 |
| Arg of perigee (deg) | 278.2245 |
| Shape | Cyl |
| Mass (kg) | 1421.21 |
| Diameter (m) | 2.4 |
| Height (m) | 6.57 |
| Span (m^2) | 6.57 |
