| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05 49 32.92974 |
| Declination | +12° 39′ 04.7582″ |
| Apparent magnitude (V) | 4.89 |
| Characteristics | |
| Spectral type | B9 IV |
| B−V color index | −0.068±0.004 |
| Astrometry | |
| Radial velocity (Rv) | +20.5±0.1 km/s |
| Proper motion (μ) | RA: −22.98 mas/yr Dec.: −18.22 mas/yr |
| Parallax (π) | 13.11 ± 0.33 mas |
| Distance | 249 ± 6 ly (76 ± 2 pc) |
| Absolute magnitude (MV) | +0.48 |
| Details | |
| Mass | 2.99 M☉ |
| Radius | 3.3 R☉ |
| Luminosity | 78.3+4.5 −8.8 L☉ |
| Surface gravity (log g) | 4.02±0.14 cgs |
| Temperature | 11,150±379 K |
| Rotational velocity (v sin i) | 26 km/s |
| Age | 248 Myr |
| Other designations | |
| 134 Tau, BD+12° 912, HD 38899, HIP 27511, HR 2010, SAO 94888, WDS J05495+1239A | |
| Database references | |
| SIMBAD | data |
134 Tauri is a single star in the zodiac constellation of Taurus. Its apparent magnitude is 4.89, which is bright enough to be faintly visible to the naked eye. The distance to this star, based upon an annual parallax shift of 13.11±0.33 mas, is around 249 light years. The star is moving further from the Sun with a heliocentric radial velocity of +20.5 km/s, having made its closest approach some three million years ago at a distance of 107 ly (32.7 pc).
This is an MK-standard star with a stellar classification of B9 IV, matching a subgiant star that is evolving away from the main sequence having exhausted the hydrogen at its core. It has a low projected rotational velocity of 26 km/s. The star is about 248 million years old with three times the mass of the Sun and approximately 3.3 times the Sun's radius. It is radiating around 78 times the Sun's luminosity from its photosphere at an effective temperature of about 11,150 K.
References
- ^ van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ Garrison, R. F.; Gray, R. O. (1994), "The late B-type stars: Refined MK classification, confrontation with stromgren photometry, and the effects of rotation", The Astronomical Journal, 107: 1556, Bibcode:1994AJ....107.1556G, doi:10.1086/116967.
- De Bruijne, J. H. J.; Eilers, A.-C. (2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: A61, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347
- ^ David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID 33401607.
- ^ Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy & Astrophysics, 367 (3rd ed.): 521–24, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- "134 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-03-28.
- Chini, R.; et al. (2012), "A spectroscopic survey on the multiplicity of high-mass stars", Monthly Notices of the Royal Astronomical Society, 424 (3): 1925–1929, arXiv:1205.5238, Bibcode:2012MNRAS.424.1925C, doi:10.1111/j.1365-2966.2012.21317.x, S2CID 119120749.
