USA 81

NORAD 21949 · Payload · In orbit since 1992

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Launched: 1992-04-25 · Vandenberg, USA
Country / operator: US (United States)
Object type: Payload
Purpose: Signals intelligence
Mass: 1,450 kg
Size: 0.5 × 1 m · 10 m deployed
Orbit class: LEO (< 2,000 km)
Perigee × Apogee: 783 × 785 km
Inclination: 85.0°
Period: 100.4 min
Eccentricity: 0.0001
Orbit data: Live orbit: current tracking elements

Mass, size and purpose from GCAT (J. McDowell, CC BY 4.0).