Launched the Orion 4 (USA-139) geostationary signals-intelligence satellite for the US National Reconnaissance Office. Also known as Advanced Orion/Mentor, it carries a large deployable dish antenna and is operated from Menwith Hill, UK.
- Outcome
- Success
- Orbit
- Direct-GEO
- Geostationary orbit
- Payload to orbit
- 5 T (est.)
- Flight
- 2nd
- of 7 Titan IVB/Centaur flights
- Date and time
- 9 May 1998, 01:38 UTC
- Rocket
- Titan IVB/Centaur
- Builder
- LM
- Launch site
- Space Launch Complex 40, Cape Canaveral SFS, FL, USA
- Payload
- Government/Top Secret
- International designator
- 1998-029
- Launches in 1998
- 30th of 82
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