Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

AE-E

retired

Science ExplorationLEOCOSPAR 1975-107ALaunched 11/20/1975

Mission & Launch

Launch Mission: Explorer 55
Launch Vehicle: Delta 2910
Launch Date: 11/20/1975
Last Contact: 6/10/1981

Orbit & Mass

Orbit Class: LEO
Altitude: 1,480.5 km
Inclination: 19.68 deg
Dry Mass: 552 kg
Total Mass: 720 kg

Payload Classification

Mission Type: Science Exploration
Payload Category: SCI
Payload Class: C

Organizations

Operator: NASA Goddard Space Flight Center
Manufacturer: RCA Astro Electronics (Astro Space)

Registry

COSPAR ID: 1975-107A
UN Registration: A/AC.105/INF.338