Celaeno (star)
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| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h 44m 48.2154s[1] |
| Declination | +24° 17′ 22.093″[1] |
| Apparent magnitude (V) | +5.448 |
| Characteristics | |
| Spectral type | B7IV |
| U−B color index | –0.33[2] |
| B−V color index | –0.046[2] |
| Astrometry | |
| Radial velocity (Rv) | +2.9[3] km/s |
| Proper motion (μ) | RA: 20.73[1] mas/yr Dec.: –44.00[1] mas/yr |
| Parallax (π) | 7.53 ± 1.23[4] mas |
| Distance | approx. 430 ly (approx. 130 pc) |
| Details | |
| Mass | ~9 - 10 M☉ |
| Radius | 4.4[5] R☉ |
| Surface gravity (log g) | 3.9[6] cgs |
| Temperature | 12,800[6] K |
| Rotational velocity (v sin i) | 185[7] km/s |
| Other designations | |
Celaeno (Celeno or 16 Tauri) is a star in the constellation Taurus and a member of the Pleaides open cluster of stars. Celaeno has been called the "Lost Pleiad" by Theon the Younger.[9] Star gazers often only see six of the seven Pleiades sisters with the unaided eye because Celaeno, with an apparent magnitude of +5.45, requires clear, dark clear skies to be observed.
16 Tauri is a blue-white B-type subgiant with an apparent magnitude of +5.45. It is approximately 430 light years from Earth;[4] about the same distance as the Pleiades. The interstellar extinction of this star is fairly small at 0.05 magnitudes.[10] The projected rotational velocity of the equator is 185 km/s.[7] It is over four times the radius of the Sun and has a surface temperature of 12,800 K.[5][6]
Namesakes
USS Celeno (AK-76) was a United States Navy Crater class cargo ship named after the star.
References
- ↑ 1.0 1.1 1.2 1.3 Perryman, M. A. C. et al. (1997), "The Hipparcos Catalogue", Astronomy & Astrophysics 323: L49–L52, Bibcode:1997A&A...323L..49P
- ↑ 2.0 2.1 Johnson, H. L.; Morgan, W. W. (1953). "Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas". Astrophysical Journal 117: 313–352. Bibcode:1953ApJ...117..313J. doi:10.1086/145697.
- ↑ Wilson, Ralph Elmer (1953). [http://adsabs.harvard.edu/abs/1953QB901.W495..... General catalogue of stellar radial velocities]. Carnegie Institution of Washington. Retrieved 2007-05-14.
- ↑ 4.0 4.1 Makarov, Valeri V. (December 2002). "Computing the Parallax of the Pleiades from the Hipparcos Intermediate Astrometry Data: An Alternative Approach". The Astronomical Journal 124 (6): 3299–3304. Bibcode:2002AJ....124.3299M. doi:10.1086/344683.
- ↑ 5.0 5.1 Pasinetti-Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (November 2000). "Catalogue of Stellar Diameters (CADARS) (Pasinetti-Fracassini+ 2001)". VizieR On-line Data Catalog: II/224. Retrieved 2009-10-10.
- ↑ 6.0 6.1 6.2 Wolff, Sidney C. (December 1990). "Luminosities, masses, and ages of B-type stars". Astronomical Journal 100: 1994. Bibcode:1990AJ....100.1994W. doi:10.1086/115654. Unknown parameter
|unused_data=ignored (help) - ↑ 7.0 7.1 Abt, Helmut A.; Levato, Hugo; Grosso, Monica (July 11–17, 2002). "Rotational velocities of B stars". In K. S. Cheng, K. C. Leung, T. P. Li. Proceedings, Stellar astrophysics - a tribute to Helmut A. Abt. Sixth Pacific Rim Conference. Xi'an, China: Kluwer Academic Publishers. pp. 165–172. ISBN 1-4020-1683-2. Vizier table J/ApJ/573/359.
- ↑ "Celeno". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-10-10.
- ↑ Allen, Richard Hinckley (1899). Star-names and their meanings. G. E. Stechert. p. 407. Retrieved 2009-10-10.
- ↑ Breger, M. (August 1984). "The Pleiades cluster. I - Polarization and reddening of the brighter stars". Astronomy and Astrophysics 137 (1): 145–148. Bibcode:1984A&A...137..145B.
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