126 Tauri
126 Tauri (126 Tau) is a blue subgiant star in the constellation Taurus. Its apparent magnitude is 4.83. It is also a binary star, with an orbital period of 111 years.[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 05h 41m 17.71768s[1] |
| Declination | +16° 32′ 02.9253″[1] |
| Apparent magnitude (V) | 4.836[2] (5.04 / 6.56)[3] |
| Characteristics | |
| Spectral type | B3 IV[4] |
| U−B color index | -0.64[5] |
| B−V color index | -0.12[5] |
| Astrometry | |
| Radial velocity (Rv) | 21.90 ± 0.9[6] km/s |
| Proper motion (μ) | RA: 3.50[1] mas/yr Dec.: −15.47[1] mas/yr |
| Parallax (π) | 5.13 ± 0.81[1] mas |
| Distance | approx. 600 ly (approx. 190 pc) |
| Orbit[3] | |
| Period (P) | 111.02 ± 1.37 yr |
| Semi-major axis (a) | 0.245 ± 0.014″ |
| Eccentricity (e) | 0.661 ± 0.036 |
| Inclination (i) | 80.5 ± 1.1° |
| Longitude of the node (Ω) | 53.2 ± 0.8° |
| Periastron epoch (T) | B 1938.13 ± 1.64 |
| Argument of periastron (ω) (secondary) | 40.9 ± 5.8° |
| Details | |
| 128 Tau A | |
| Mass | 6.31 ± 0.42[4] M☉ |
| Luminosity | 2061[4] L☉ |
| Temperature | 17900[4] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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.
- Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 20 August 2017.
- Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355.
- Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
- Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776.
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