Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

Sirio 1

retired

CommunicationsGEOCOSPAR 1977-080ALaunched 8/25/1977

Mission & Launch

Launch Mission: Sirio
Launch Vehicle: Delta 2313
Launch Date: 8/25/1977
Last Contact: 9/28/1989

Orbit & Mass

Orbit Class: GEO
Altitude: 35,817.5 km
Inclination: 1.33 deg
Dry Mass: 168 kg
Total Mass: 398 kg

Payload Classification

Mission Type: Communications
Payload Category: COM
Payload Class: C

Organizations

Operator: National Research Council of Italy
Manufacturer: Aeritalia Space Systems

Registry

COSPAR ID: 1977-080A
UN Registration: A/AC.105/INF.379