It was launched on December 11, 1998. It was a 338 kg spacecraft designed to study Mars. Its purpose of launch was to study Martian climate and additionally it was designed to fill in as a radio transfer for the Mars Polar Lander mission. It contained the specially designed cameras to get required data. The measurements of Mars Climate Orbiter were, width was 1.6 meters, depth was 2 meters and height was 2.1 meters. It was designed with a place inside it for attachment of scientific instruments and engine.
But it was lost when was arrived to Mars, because it was unable to translate English units into metrics. Which results in failure of navigation. It was later predicted that the failure was also due to low speed of spacecraft as it entered the Mars and orbit too slowly. It also carried many instruments from Mars Observer but failed to perform on required level.