Satellite · NORAD 3337 · COSPAR 1968-066A
EXPLORER 39 (ADI-3)
- Operator United States
- Constellation —
- Country United States
Altitude now
—
object decayed
Velocity
—
Inclination
80.54°
Period
89.5 min
89.5 min
Perigee
219km
Apogee
278km
orbit unavailableNo orbital element set on file — decayed 22 Jun 1981.· Metadata updated 26 h ago
Live position
Live position
Live position unavailable — this object re-entered the atmosphere on 22 Jun 1981 and is no longer tracked.
Mission
Mission & classification
- Mission type derived
- Unknown
- Object type
- Payload
- SATCAT ops status
- Decayed [D]
- Radar cross-section
- 10.4 m²
CelesTrak groups
Not listed in any CelesTrak group.
Aliases
- EXPLORER 39 (ADI-3)Celestrak Satcat
Ownership
Operator & country
- Operator
- —
- SATCAT owner code
- US · United States
- Country
- United States US
Launch
Launch
- Launch date
- 08 Aug 1968
- COSPAR launch id
- 1968-066
Objects from the same launch · 12
- SCOUT B DEB3342DebrisDecayed
- SCOUT B DEB3343DebrisDecayed
- SCOUT B DEB3390DebrisDecayed
- SCOUT B DEB3391DebrisDecayed
- SCOUT B DEB3392DebrisInactive
- SCOUT B DEB3393DebrisDecayed
- SCOUT B DEB23307DebrisDecayed
- SCOUT B DEB29277DebrisDecayed
- SCOUT B DEB29278DebrisInactive
- SCOUT B DEB29279DebrisInactive
- EXPLORER 40 (INJUN 5)3338PayloadUnknown
- SCOUT B R/B3341Rocket 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
- 3337
- COSPAR / international designator
- 1968-066A
- SatelliteIndex id
- sat_01M28X3JJV4YJEF0HWA4V03QPD
- Canonical slug
- explorer-39-adi-3-3337
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.