Shuttle Orbiter Challenger (NASA Designation: OV-99) was a Space Shuttle orbiter. Challenger was the second shuttle orbiter to be placed into service (after Columbia) and was constructed using a body frame (STA-099) that had initially been produced for use as a test article. Its maiden voyage was on April 4, 1983, and made eight subsequent round trips to low earth orbit before it was destroyed during launch for its tenth mission, mission 51-L.
