Launched NASA's Mars Climate Orbiter from Cape Canaveral to study the Martian atmosphere and relay data for the upcoming Mars Polar Lander. The spacecraft was lost in September 1999 after a metric/imperial unit mismatch caused it to burn up during orbital insertion.
- Outcome
- Success
- Orbit
- Helio-N/A
- Heliocentric orbit
- Payload to orbit
- 629 kg
- Flight
- 1st
- of 3 Delta II 7425-9.5 flights
- Date and time
- 11 December 1998, 18:45 UTC
- Rocket
- Delta II 7425-9.5
- Builder
- McDonnell Douglas
- Launch site
- Space Launch Complex 17A, Cape Canaveral SFS, FL, USA
- Payload
- Robotic Exploration
- International designator
- 1998-073
- Launches in 1998
- 78th of 82
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