Rocket body · NORAD 18721 · COSPAR 1987-110B
SL-4 R/B
- Operator Commonwealth of Independent States (former USSR)
- Constellation —
- Country Russia
Altitude now
—
object decayed
Velocity
—
Inclination
72.81°
Period
87.1 min
87.1 min
Perigee
116km
Apogee
140km
orbit unavailableNo orbital element set on file — decayed 12 Jan 1988.· Metadata updated 10 h ago
Live position
Live position
Live position unavailable — this object re-entered the atmosphere on 12 Jan 1988 and is no longer tracked.
Mission
Mission & classification
- Mission type derived
- Rocket body
- Object type
- Rocket body
- SATCAT ops status
- Decayed [D]
- Radar cross-section
- —
CelesTrak groups
Not listed in any CelesTrak group.
Aliases
- SL-4 R/BCelestrak Satcat
Ownership
Operator & country
- Operator
- —
- SATCAT owner code
- CIS · Commonwealth of Independent States (former USSR)
- Country
- Russia RU
Launch
Launch
- Launch date
- 29 Dec 1987
- COSPAR launch id
- 1987-110
- Launch site
- Plesetsk Cosmodrome
Objects from the same launch · 8
- SL-4 DEB18724DebrisDecayed
- COSMOS 1907 DEB18768DebrisDecayed
- COSMOS 1907 DEB18769DebrisDecayed
- COSMOS 1907 DEB18770DebrisDecayed
- COSMOS 1907 DEB18771DebrisDecayed
- COSMOS 1907 DEB18772DebrisDecayed
- COSMOS 1907 DEB18808DebrisDecayed
- COSMOS 190718720PayloadDecayed
Change log
History
No changes recorded since first ingestion on 11 Sept 2026 18:54 UTC. Status, orbit class, name and ownership changes are logged here as sources are re-ingested.
Regulatory
UN registration
Transparency
Sources & provenance
No source is linked to this record yet — the catalogue row exists but no provenance entry has been written for it.
Field provenance
No field-level provenance recorded.
Timeline
Events
No events detected for this object yet. Launches, decays and orbit changes are generated by the derived-analytics connector.
Reference
Identifiers
- NORAD catalogue number
- 18721
- COSPAR / international designator
- 1987-110B
- SatelliteIndex id
- sat_01M28X3JP3HXEYJ1YG13G74QP1
- Canonical slug
- sl-4-r-b-18721
Orbit class, mission type and constellation membership are derived by SatelliteIndex (Rocket body) — see the methodology. Positions are propagated estimates, not tracking measurements; never use them for conjunction assessment.