Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

Skynet 4B

retired

CommunicationsGEOCOSPAR 1988-109ALaunched 12/11/1988

Mission & Launch

Launch Mission: Skynet 4B/Astra 1A
Launch Vehicle: Ariane 44LP 44LP
Launch Date: 12/11/1988
Last Contact: 6/22/1998

Orbit & Mass

Orbit Class: GEO
Altitude: 35,786 km
Inclination: 3 deg
Dry Mass: 655 kg
Total Mass: 1,433 kg

Payload Classification

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

Organizations

Operator: U.K. Ministry of Defence
Manufacturer: BAE Systems

Constellation

Name: Skynet military communications
Active Satellites: 6

Registry

COSPAR ID: 1988-109A
UN Registration: ST/SG/SER.E/214