Suzaku, formerly Astro-E2, is Japan's fifth X-ray astronomy mission. It was developed by Japan in collaboration with NASA and MIT. The mission's objective is to observe a variety of X-ray sources at high-energy resolution and sensitivity. Suzaku is the recovery mission for ASTRO-E, which failed to achieve orbit during launch in February 2000. Suzaku launched in July 2005. Goddard Space Flight Center helped develop one of Suzaku's instruments and manages the mission's Guest Observer Program.