In orbitRocket body

SL-6 R/B(2)

NORAD: 18106
COSPAR: 1987-050D

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
Dry mass: 900 kg
Total mass with attached parts: 900 kg
Length: 3.3 m
Diameter: 2.3 m
Span with arrays and booms: 3.3 m
Shape: Cyl

From GCAT by Jonathan McDowell (CC BY 4.0), record S18106, checked 2026-11-05. About this source

Launch

Launch date: 1987-06-12
Rocket: Molniya 8K78M 2BL
Flight: Kosmos-1851
Mission name: Oko
Launch site: NIIP-53, LC43/4
Launched by: Upravleniye Nachalnika Kosmicheskikh Sredstv
Rocket performance: Success
Launch designator: 1987-050

From the GCAT launch log, launch 1987-050, checked 2026-11-05. About this source

Catalogue record

Object type: Rocket body
Owner code: CIS
Launch date: 1987-06-12
Period: 707.4 min
Inclination: 70.25°
Apogee: 34,295 km
Perigee: 5,544 km
Radar cross-section: 6.9273 m²

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

Where it came from

Parent object: SL-6 R/B(1) (NORAD 18104)
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

Debris1 in total, 0 still in orbit
Payload1 in total, 1 still in orbit
Rocket body2 in total, 1 still in orbit