Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

Milstar 3

retired

CommunicationsMEOCOSPAR 1999-023ALaunched 4/30/1999

Mission & Launch

Launch Mission: USA 143 (Milstar 3)
Launch Vehicle: Titan 401B
Launch Date: 4/30/1999
Last Contact: 5/12/1999

Orbit & Mass

Orbit Class: MEO
Altitude: 3,123 km
Inclination: 28.2 deg
Dry Mass: 4,200 kg
Total Mass: 4,500 kg

Payload Classification

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

Organizations

Operator: U.S. Space Systems Command
Manufacturer: Lockheed Martin

Constellation

Name: Milstar
Active Satellites: 5

Registry

COSPAR ID: 1999-023A
UN Registration: ST/SG/SER.E/360