Saiph
Coordinates: 
05h 47m 45.4s, −09° 40′ 11″
05h 47m 45.4s, −09° 40′ 11″  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 47m 45.38884s[1] |
| Declination | −09° 40′ 10.5777″[1] |
| Apparent magnitude (V) | 2.09[2] |
| Characteristics | |
| Spectral type | B0.5 Ia[3] |
| U−B color index | −1.02[2] |
| B−V color index | −0.18[2] |
| Variable type | Suspected[4] |
| Absolute magnitude (MV) | −6.1[6] |
| Details | |
Myr | |
| Database references | |
| SIMBAD | data |
Saiph
Nomenclature
Kappa Orionis is the star's
giant. This name was originally applied to Eta Orionis.[10] In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[11] to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016[12] included a table of the first two batches of names approved by the WGSN; which included Saiph for this star. It is now so entered in the IAU Catalog of Star Names.[13]
In the 17th-century catalogue of stars in the Calendarium of Al Achsasi al Mouakket, this star was designated Rekbah al Jauza al Yemeniat, which was translated into Latin as Genu Dextrum Gigantis "right knee of the giant".[14]
Properties
Saiph is a
spectrum yields a mass 15.50 ± 1.25 times and luminosity 56,881 times that of the Sun.[7] Analysis of the spectra and age of the members of the Orion OB1 association yields a mass 28 times that of the Sun (from an original mass 31.8 times that of the Sun) and an age of 6.2 million years.[15] Large stars such as Saiph (and many other stars in Orion) are destined to collapse on themselves and explode as supernovae.[16]
In non-Western astronomy and culture
In
The Wardaman people of northern Australia regard Saiph as the Guman digging stick, used to make a canyon by Black-headed Python.[19]
References
- ^ S2CID 18759600
- ^ doi:10.1086/111220
- .
- ^
- Bibcode:1999VeARI..35....1W
- ^ S2CID 18815761
- ^ S2CID 111387483
- S2CID 118629873
- ^ "SAIPH -- Variable Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-01-12
- ^ Allen, Richard Hinckley (1899). Star-names and their meanings. G. E. Stechert. p. 317.
- ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
- ^ "Bulletin of the IAU Working Group on Star Names, No. 1" (PDF). Retrieved 28 July 2016.
- ^ "IAU Catalog of Star Names". Retrieved 28 July 2016.
- .
- S2CID 38599952. A51.
- ^ Kaler, James B., "SAIPH (Kappa Orionis)", Stars, University of Illinois, retrieved 2012-01-27
- ISBN 978-986-7332-25-7.
- ^ (in Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 5 月 25 日
- ISBN 0-9750908-0-1.
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