|Names||Astro-C before launch|
|Mission type||X-ray Astronomy|
|Operator||Institute of Space and Astronautical Science|
University of Tokyo
|Launch mass||400 kg (880 lb)|
|Start of mission|
|Launch date||06:28:00, February 5, 1987 (UTC)|
|Launch site||Uchinoura Space Center|
|End of mission|
|Decay date||November 1, 1991|
|Perigee||517 km (321 mi)|
|Apogee||708 km (440 mi)|
|Epoch||February 5, 1987|
ASTRO-C, renamed Ginga (Japanese for 'galaxy'), was an X-ray astronomy satellite launched from the Kagoshima Space Center on 5 February 1987 using M-3SII launch vehicle. The primary instrument for observations was the Large Area Counter (LAC). Ginga was the third Japanese X-ray astronomy mission, following Hakucho and Tenma. Ginga reentered the Earth's atmosphere on 1 November 1991.
- Large Area Proportional Counter (LAC 1.5-37 keV)
- All-Sky Monitor (ASM 1-20 keV)
- Gamma-ray Burst Detector (GBD 1.5-500 keV)
- Discovery of transient Black Hole Candidates and study of their spectral evolution.
- Discovery of weak transients in the galactic ridge.
- Detection of cyclotron features in 3 X-ray pulsars: 4U1538-522, V0332+53, and Cep X-4.
- Evidence for emission and absorption Fe feature in Seyfert probing reprocessing by cold matter.
- Discovery of intense 6-7 keV iron line emission from the galactic center region.
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