Astronomy:Tenma
From HandWiki
 Tenma (Japanese for "Pegasus") | |||||||||
| Names | ASTRO-B | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Mission type | X-ray astronomy | ||||||||
| Operator | ISAS | ||||||||
| COSPAR ID | 1983-011A | ||||||||
| SATCAT no. | 13829 | ||||||||
| Mission duration | 5 years, 9 months, 27 days | ||||||||
| Spacecraft properties | |||||||||
| Launch mass | 216 kg (476 lb)[1] | ||||||||
| Dimensions | 0.94 m × 0.895 m (3.08 ft × 2.94 ft) | ||||||||
| Start of mission | |||||||||
| Launch date | 20 February 1983, 05:10 UTC | ||||||||
| Rocket | M-3S | ||||||||
| Launch site | Kagoshima Space Center | ||||||||
| End of mission | |||||||||
| Disposal | Decommissioned | ||||||||
| Last contact | 17 December 1988[2] | ||||||||
| Decay date | 19 January 1989 | ||||||||
| Orbital parameters | |||||||||
| Reference system | Geocentric[1] | ||||||||
| Regime | Low Earth | ||||||||
| Perigee altitude | 489 km (304 mi) | ||||||||
| Apogee altitude | 503 km (313 mi) | ||||||||
| Inclination | 31.5° | ||||||||
| Period | 94 minutes | ||||||||
| |||||||||
Tenma, known as ASTRO-B before launch, was a Japanese X-ray astronomy satellite developed by the Institute of Space and Astronautical Science. It was launched on 20 February 1983, using a M-3S rocket on the M-3S-3 mission. It was the second X-ray observatory successfully operated by Japan after Hakucho (CORSA-B),[3][lower-alpha 1] and it had a superior temporal and spectral sensitivity compared to its predecessor.[5]
Battery failure in July 1984 caused the operation to become limited, and continuing problems lead to the termination of X-ray observation on 11 November 1985,[6] however it remained in sporadic contact until 17 December 1988.[2] It reentered the atmosphere on 19 January 1989.[lower-alpha 2]
Highlights
- Discovery of the iron helium-like emission from the galactic ridge.[6]
- Iron line discovery and/or study in many LMXRB, HMXRB and AGN.[2]
- Discovery of an absorption line at 4 keV in the X1636-536 Burst spectra.
References
Notes
Citations
- ↑ 1.0 1.1 "Astro B (Tenma)". https://space.skyrocket.de/doc_sdat/astro-b.htm.
- ↑ 2.0 2.1 2.2 "Tenma | Spacecraft". JAXA / ISAS. https://www.isas.jaxa.jp/en/missions/spacecraft/past/tenma.html.
- ↑ Y. Tanaka et al. (1984). "X-ray astronomy satellite Tenma". Publications of the Astronomical Society of Japan 36 (4): 641–658. doi:10.1093/pasj/36.4.641. ISSN 0004-6264. Bibcode: 1984PASJ...36..641T. https://academic.oup.com/pasj/article-pdf/36/4/641/63376819/pasj_36_4_641.pdf.
- ↑ "Corsa A, B (Hakucho)". https://space.skyrocket.de/doc_sdat/corsa-a.htm.
- ↑ C. Simpson (1984). "Tenma – Japan's X-ray satellite". Spaceflight 26: 284. ISSN 0038-6340. Bibcode: 1984SpFl...26..284S.
- ↑ 6.0 6.1 "The Tenma [Astro-B satellite"]. NASA / GSFC. 7 October 2003. https://heasarc.gsfc.nasa.gov/docs/tenma/tenma_about.html.
- ↑ "CelesTrak: Search Satellite Catalog". https://celestrak.org/satcat/table-satcat.php?NAME=Tenma&PAYLOAD=1&MAX=500.
External links
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