Ọkọ̀-àlọbọ̀ Òfurufú Challenger (NASA Orbiter Vehicle Designation: OV-099) je Ọkọ̀-àlọbọ̀ Òfurufú keji ti NASA, Columbia ni akoko. Harwood, William (October 12, 2009). "STS-129/ISS-ULF3 Quick-Look Data". CBS News. http://www.cbsnews.com/network/news/space/129/129quicklook2.pdf. Retrieved November 30, 2009.