| Official name | SL-8 R/B |
| Alternative name | Cosmos 3 second stage (S3) (Cosmos 3M (11K65M)) |
| Cospar ID | 1977-111B |
| Norad ID | 10503 |
| Launch date | 1977-12-08 |
| Launch site | PKMTR |
| Launch vehicle | Kosmos-3M |
| RCS size | LARGE |
| Decay date | 1979-11-14 |
| Shape | Cyl |
| Mass (kg) | 1421.21 |
| Diameter (m) | 2.4 |
| Height (m) | 6.57 |
| Span (m^2) | 6.57 |






