| Official name | SL-8 R/B |
| Alternative name | Cosmos 3 second stage (S3) (Cosmos 3M (11K65M)) |
| Cospar ID | 1979-003B |
| Norad ID | 11239 |
| Launch date | 1979-01-16 |
| Launch site | PKMTR |
| Launch vehicle | Kosmos-3M |
| RCS size | LARGE |
| Decay date | ON ORBIT |
| Period (min) | 104.65 |
| Inclination (deg) | 82.94 |
| Perigee (km) | 947 |
| Apogee (km) | 1009 |
| Eccentricity | 0.0316973415132924 |
| Mean motion (revs. per day) | 13.7601528905877 |
| Semi-Major axis (km) | 7356.135 |
| Raan (deg) | 359.1115 |
| Arg of perigee (deg) | 121.6384 |
| Shape | Cyl |
| Mass (kg) | 1421.21 |
| Diameter (m) | 2.4 |
| Height (m) | 6.57 |
| Span (m^2) | 6.57 |
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