Satellite · NORAD 12887 · COSPAR 1981-100A
SME
- Operator United States
- Constellation —
- Country United States
Altitude now
—
object decayed
Velocity
—
Inclination
97.56°
Period
88.0 min
88.0 min
Perigee
170km
Apogee
179km
orbit unavailableNo orbital element set on file — decayed 05 Mar 1991.· Metadata updated 9 h ago
Live position
Live position
Live position unavailable — this object re-entered the atmosphere on 05 Mar 1991 and is no longer tracked.
Mission
Mission & classification
- Mission type derived
- Unknown
- Object type
- Payload
- SATCAT ops status
- Decayed [D]
- Radar cross-section
- 7.5 m²
CelesTrak groups
Not listed in any CelesTrak group.
Aliases
- SMECelestrak Satcat
Ownership
Operator & country
- Operator
- —
- SATCAT owner code
- US · United States
- Country
- United States US
Launch
Launch
- Launch date
- 06 Oct 1981
- COSPAR launch id
- 1981-100
Objects from the same launch · 4
- THOR DELTA 1 DEB12891DebrisDecayed
- SME DEB13405DebrisDecayed
- UOSAT 1 (UO-9)12888PayloadDecayed
- THOR DELTA 1 R/B12889Rocket bodyInactive
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
- 12887
- COSPAR / international designator
- 1981-100A
- SatelliteIndex id
- sat_01M28X3JN3K8TJJ4HEYXYF75Z1
- Canonical slug
- sme-12887
Orbit class, mission type and constellation membership are derived by SatelliteIndex (Unknown) — see the methodology. Positions are propagated estimates, not tracking measurements; never use them for conjunction assessment.