Satellite Advanced Orion 2 (NROL 6, USA 139) of National Reconnaissance Office (NRO)

Name of Satellite, Alternate Names Advanced Orion 2 (NROL 6, USA 139)
Country of Operator/Owner USA
Operator/Owner National Reconnaissance Office (NRO)
Users Military
Purpose Electronic Surveillance
Class of Orbit GEO
Type of Orbit
Longitude of GEO (degrees) -14.5
Perigee (km) 35560
Apogee (km) 36013
Eccentricity 0.00537283692906195
Inclination (degrees) 7.72
Period (minutes) 1436.14
Launch Mass (kg.) 4500
Dry Mass (kg.)
Power (watts)
Date of Launch 09-05-1998
Expected Lifetime
Contractor TRW Space and Electronics
Country of Contractor USA
Launch Site Cape Canaveral
Launch Vehicle Titan IVA
COSPAR Number 1998-029A
NORAD Number 25336
Comments ELINT.

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