Satellite · NORAD 740 · COSPAR 1964-004A
ECHO 2 (A-12)
- Operator United States
- Constellation —
- Country United States
Altitude now
—
object decayed
Velocity
—
Inclination
81.40°
Period
94.5 min
94.5 min
Perigee
465km
Apogee
522km
orbit unavailableNo orbital element set on file — decayed 07 Jun 1969.· Metadata updated 16 h ago
Live position
Live position
Live position unavailable — this object re-entered the atmosphere on 07 Jun 1969 and is no longer tracked.
Mission
Mission & classification
- Mission type derived
- Unknown
- Object type
- Payload
- SATCAT ops status
- Decayed [D]
- Radar cross-section
- —
CelesTrak groups
Not listed in any CelesTrak group.
Aliases
- ECHO 2 (A-12)Celestrak Satcat
Ownership
Operator & country
- Operator
- —
- SATCAT owner code
- US · United States
- Country
- United States US
Launch
Launch
- Launch date
- 25 Jan 1964
- COSPAR launch id
- 1964-004
Objects from the same launch · 4
- ECHO 2 DEB [METAL OBJ]742DebrisInactive
- ECHO 2 DEB [METAL OBJ]743DebrisInactive
- THOR AGENA B DEB749DebrisDecayed
- THOR AGENA B R/B741Rocket 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
- 740
- COSPAR / international designator
- 1964-004A
- SatelliteIndex id
- sat_01M28X3JJCP6W1J01F09Z6JYEH
- Canonical slug
- echo-2-a-12-740
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.