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Helios 1

retired

Science ExplorationinterplanetaryCOSPAR 1974-097ALaunched 12/10/1974

Mission & Launch

Launch Mission: Helios 1 Mission
Launch Vehicle: Titan IIIE
Launch Date: 12/10/1974
Last Contact: 1/1/1981

Orbit & Mass

Orbit Class: interplanetary
Altitude: -10,832.5 km
Inclination: 29.8 deg
Dry Mass: 370 kg
Total Mass: 370 kg

Payload Classification

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

Organizations

Operator: DFVLR
Manufacturer: Airbus

Registry

COSPAR ID: 1974-097A
UN Registration: A/AC.105/INF.380

Mentions

1

All verified mentions of this spacecraft in source documents.

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OG2’s launch and commissioning phase using the Helios 1 OTV is scheduled for 01-Jan-2027 to 02-Jan-2027.

PlanValue 4.0Apr 2, 2026Oman government, still struggling to get a placeholder satellite to 73.5 degrees east, again rebuffed by ITU