In orbitRocket body

SL-6 R/B(2)

NORAD: 12311
COSPAR: 1981-016E

OrbitalWiki publishes live orbits for active satellites only. This object is in the full catalogue: who launched it, what it is and its last published orbit are below, but there are no current orbital elements for it here.

Spacecraft

Built by: NPO Energiya
Owner: Strategic Rocket Forces
Platform (bus): Blok-L
Mass at launch: 4,500 kg(estimate, good to about 20%)
Dry mass: 1,000 kg(estimate, good to about 20%)
Total mass with attached parts: 900 kg(estimate, good to about 20%)
Length: 2.7 m
Diameter: 2.5 m
Span with arrays and booms: 2.7 m
Shape: Cyl

From GCAT by Jonathan McDowell (CC BY 4.0), record S12311, checked 2026-11-05. About this source

Launch

Launch date: 1981-02-19
Rocket: Molniya 8K78M 2BL
Flight: Kosmos-1247
Mission name: Oko
Launch site: NIIP-53, LC16/2
Launched by: Strategic Rocket Forces
Rocket performance: Success
Launch designator: 1981-016

From the GCAT launch log, launch 1981-016, checked 2026-11-05. About this source

Catalogue record

Object type: Rocket body
Owner code: CIS
Launch date: 1981-02-19
Period: 703.5 min
Inclination: 71.77°
Apogee: 34,064 km
Perigee: 5,587 km
Radar cross-section: 5.46 m²

From CelesTrak SATCAT, checked 2026-11-05. About this source

Where it came from

Parent object: SL-6 R/B(1) (NORAD 12304)
Catalogued pieces that came from it: 2

The object this one was attached to at launch, or broke off from, as GCAT records it.

Everything from this launch

Debris9 in total, 6 still in orbit
Payload1 in total, 1 still in orbit
Rocket body2 in total, 1 still in orbit