Polaris Intelligence
Polaris
Intelligence
About
Ctrl K
Sign in
© Polaris Intelligence 2026
PrivacyTermsAdmin

SAS 3

retired
Science ExplorationLEOCOSPAR 1975-037ALaunched 5/7/1975
Admin Edit
Mission & Launch
Launch Mission
Explorer 53
Launch Vehicle
Scout F-1
Launch Date
5/7/1975
Last Contact
4/9/1979
Orbit & Mass
Orbit Class
LEO
Altitude
505.5 km
Inclination
3 deg
Dry Mass
189 kg
Total Mass
189 kg
Payload Classification
Mission Type
Science Exploration
Payload Category
AST
Payload Class
C
Organizations
Operator
NASA Goddard Space Flight Center
Manufacturer
Johns Hopkins Applied Physics Lab
Registry
COSPAR ID
1975-037A
UN Registration
A/AC.105/INF.321
Track