Ctrl K

© Polaris Intelligence 2026

Privacy Terms Admin

TOPHAT II

retired

Signals IntelligenceLEOCOSPAR 1974-020CLaunched 4/10/1974

Mission & Launch

Launch Mission: HEXAGON SV8
Launch Vehicle: Titan IIID
Launch Date: 4/10/1974
Last Contact: 2/22/1980

Orbit & Mass

Orbit Class: LEO
Altitude: 514.5 km
Inclination: 94 deg
Dry Mass: 162 kg
Total Mass: 172 kg

Payload Classification

Mission Type: Signals Intelligence
Payload Category: SIG
Payload Class: D

Organizations

Operator: U.S. National Reconnaissance Office (NRO)
Manufacturer: Lockheed Martin

Registry

COSPAR ID: 1974-020C
UN Registration: A/AC.105/INF.295