Ohsumi

retired

おおすみ

Technology DemonstrationMEOCOSPAR 1970-011ALaunched 2/11/1970

Admin Edit

Mission & Launch

Launch Mission: L-4S-5
Launch Vehicle: Lambda 4S
Launch Date: 2/11/1970
Last Contact: 2/12/1970

Orbit & Mass

Orbit Class: MEO
Altitude: 2,726 km
Inclination: 31.11 deg
Dry Mass: 9 kg
Total Mass: 24 kg

Payload Classification

Mission Type: Technology Demonstration
Payload Category: TECH
Payload Class: C

Organizations

Operator: Japan Aerospace Exploration Agency (JAXA)
Manufacturer: Nissan

Registry

COSPAR ID: 1970-011A
UN Registration: A/AC.105/INF.215

Track

Mentions

1

All verified mentions of this spacecraft in source documents.

Under Hideo Itokawa's leadership, ISAS developed larger rockets, including the vehicle that placed Japan's first satellite, Ohsumi, into orbit in 1970.

GovernanceCapabilityValue 3.5Jan 26, 2026Review: The Islands and the Stars