126 Tauri
| 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 mas[1] |
| Distance | approx. 600 ly (approx. 190 pc) |
| Orbit[7][3] | |
| Primary | A |
| Companion | B |
| Period (P) | 118±7 yr |
| Semi-major axis (a) | 0.185±0.007″ |
| Eccentricity (e) | 0.78±0.01 |
| Inclination (i) | 68.9±0.7° |
| Longitude of the node (Ω) | 63.5±0.8° |
| Periastron epoch (T) | 61118±35 |
| Argument of periastron (ω) (secondary) | 338±4° |
| Orbit[7] | |
| Primary | Ba |
| Companion | Bb |
| Period (P) | 4.77095±0.00023 d |
| Semi-major axis (a) | 0.055±0.013 mas |
| Eccentricity (e) | 0.0 |
| Inclination (i) | 30±19° |
| Longitude of the node (Ω) | 310±14° |
| Periastron epoch (T) | 59529.10±0.01 |
| Argument of periastron (ω) (secondary) | 0.0° |
| Semi-amplitude (K1) (primary) | 72.9±0.3 km/s |
| Details | |
| 128 Tau A | |
| Mass | 6.14[8] M☉ |
| Luminosity | 2,061[4] L☉ |
| Temperature | 17,900[4] K |
| Ba | |
| Mass | 3.19[8] M☉ |
| B | |
| Mass | 1.65[8] M☉ |
| Other designations | |
| BD+16°841, HD 37711, HIP 26777, HR 1946, SAO 94759 | |
| Database references | |
| SIMBAD | data |
126 Tauri (126 Tau) is a triple star system in the constellation Taurus, approximately 600 light years away. Its apparent magnitude is 4.83, making it visible to the naked eye with dark skies.
126 Tauri is a well-known binary star with the two components in an eccentric orbit of over a hundred years. The secondary, component B, has also shown radial velocity variations that indicate an unseen companion in a 4.77-day orbit.[7]
The combined spectral class is typically quoted as B3IV, occasionally B3V.[9] The primary alone has been classed as B3V,[10] although the two components have been individually measured at B8V and B7V.[7]
References
[edit]- ^ a b c d e 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.
- ^ 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.
- ^ a b "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 20 August 2017.
- ^ a b c 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. S2CID 111387483.
- ^ a b 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. S2CID 119323941.
- ^ a b c d Gardner, Tyler; Monnier, John D.; Fekel, Francis C.; Le Bouquin, Jean-Baptiste; Scovera, Adam; Schaefer, Gail; Kraus, Stefan; Adams, Fred C.; Anugu, Narsireddy; Berger, Jean-Philippe; Ten Brummelaar, Theo; Davies, Claire L.; Ennis, Jacob; Gies, Douglas R.; Johnson, Keith J. C.; Kervella, Pierre; Kratter, Kaitlin M.; Labdon, Aaron; Lanthermann, Cyprien; Sahlmann, Johannes; Setterholm, Benjamin R. (2022). "ARMADA. II. Further Detections of Inner Companions to Intermediate-mass Binaries with Microarcsecond Astrometry at CHARA and VLTI". The Astronomical Journal. 164 (5): 184. arXiv:2209.00669. Bibcode:2022AJ....164..184G. doi:10.3847/1538-3881/ac8eae.
- ^ a b c Tokovinin, Andrei (2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5.
- ^ Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009- )". Vizier Online Data Catalog. Bibcode:2014yCat....1.2023S.
- ^ Hoffleit, Dorrit; Jaschek, Carlos (1991). The Bright Star Catalogue. Yale University Observatory. Bibcode:1991bsc..book.....H.
