JAXA/ISAS's ASCA (ASTRO-D) was a Japanese X-ray astronomy mission launched on 1993-02-20 aboard M-3SII-7 from Uchinoura. It performed precise X-ray observations of celestial bodies and explored the deep universe, including galaxy clusters, black holes, particle acceleration, dark matter, and the cosmic X-ray background, until operations ended on 2001-03-02.
Alerts are unavailable because this mission is no longer active.