| Hakuchō | |
| Operator: | Institute of Space and Astronautical Science (Japan) |
| Mission Type: | X Ray Celestial Observation |
| Cospar Id: | 1979-014A |
| Satcat: | 11272 |
| Launch Rocket: | M-3C-Rocket (mission 4) |
| Decay Date: | April 15, 1985 |
| Dimensions: | ⌀760mm×650mm |
Hakucho (also known as CORSA-b before launch; CORSA stands for Cosmic Radiation Satellite) was Japan's first X-ray astronomy satellite, developed by the Institute of Space and Aeronautical Science (then a division of the University of Tokyo). It was launched from the Kagoshima Space Center by the ISAS M-3C rocket on the M-3C-4 mission on February 21, 1979 [1] and reentered the atmosphere on April 15, 1985.[2]
Hakucho was a replacement for the Cosmic Radiation Satellite (CORSA) satellite which failed to launch due to rocket failure on February 4, 1976.[3]