Astronomy:37 Tauri
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 04m 41.71484s[1] |
| Declination | +22° 04′ 54.9243″[1] |
| Apparent magnitude (V) | 4.36[2] |
| Characteristics | |
| Spectral type | K0 III-IIIb[3] |
| U−B color index | 0.95[4] |
| B−V color index | 1.07[5] |
| R−I color index | 0.53[4] |
| Astrometry | |
| Radial velocity (Rv) | +9.52±0.11[6] km/s |
| Proper motion (μ) | RA: +90.53[1] mas/yr Dec.: −59.47[1] mas/yr |
| Parallax (π) | 17.43 ± 0.21[1] mas |
| Distance | 187 ± 2 ly (57.4 ± 0.7 pc) |
| Absolute magnitude (MV) | 0.57[2] |
| Details | |
| Mass | 1.99[5] M☉ |
| Radius | 10.15±0.69[7] R☉ |
| Luminosity | 60±6[7] L☉ |
| Surface gravity (log g) | 2.77[7] cgs |
| Temperature | 4,732±26[5] K |
| Metallicity [Fe/H] | +0.01[7] dex |
| Rotational velocity (v sin i) | 2.8[6] km/s |
| Age | 1.39[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
37 Tauri is a single,[9] orange-hued star in the zodiac constellation of Taurus. It can be seen with the naked eye, having an apparent visual magnitude of 4.36.[2] A magnitude 10.01 visual companion has an angular separation of 134.30″ on a position angle of 138.6°, as of 2003.[10] Based on an annual parallax shift of 17.43±0.21 mas,[1] 37 Tauri is about 187 light years away. It is moving further from the Sun with a heliocentric radial velocity of 9.5 km/s.[6]
This is an evolved K-type giant star with a stellar classification of K0 III-IIIb.[3] At the age of 1.39[5] billion years, it has become a red clump giant, indicating that it is generating energy through helium fusion at its core.[11] The star has around double the mass of the Sun and has expanded to 10[7] times the Sun's radius. It is radiating roughly 60[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,732 K.[5]
Chinese astronomy
In Chinese astronomy, 37 Tauri is called 月, Pinyin: Yuè, meaning Moon, because this star is marking itself and stand alone in Moon asterism, Hairy Head mansion (see : Chinese constellation).[12]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 4.0 4.1 Ducati, J. R. (2002), "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system", CDS/ADC Collection of Electronic Catalogues 2237, Bibcode: 2002yCat.2237....0D.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal 150 (3): 88, doi:10.1088/0004-6256/150/3/88, Bibcode: 2015AJ....150...88L.
- ↑ 6.0 6.1 6.2 Massarotti, Alessandro et al. (January 2008), "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity", The Astronomical Journal 135 (1): 209–231, doi:10.1088/0004-6256/135/1/209, Bibcode: 2008AJ....135..209M.
- ↑ 7.0 7.1 7.2 7.3 7.4 7.5 Piau, L. et al. (2010), "Surface convection and red-giants radii measurements", Astronomy and Astrophysics 526: 12, doi:10.1051/0004-6361/201014442, A100, Bibcode: 2011A&A...526A.100P.
- ↑ "37 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=37+Tau.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
- ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M
- ↑ Puzeras, E. et al. (October 2010), "High-resolution spectroscopic study of red clump stars in the Galaxy: iron-group elements", Monthly Notices of the Royal Astronomical Society 408 (2): 1225–1232, doi:10.1111/j.1365-2966.2010.17195.x, Bibcode: 2010MNRAS.408.1225P.
- ↑ Ian Ridpath's Star Tales - Taurus the Bull
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