Astronomy:72 Tauri
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 27m 17.4508s[1] |
| Declination | +22° 59′ 46.778″[1] |
| Apparent magnitude (V) | 5.514[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | B7V[3] |
| U−B color index | −0.48[4] |
| B−V color index | −0.10[4] |
| Astrometry | |
| Radial velocity (Rv) | 32.2±1.1[5] km/s |
| Proper motion (μ) | RA: −1.409[1] mas/yr Dec.: −13.722[1] mas/yr |
| Parallax (π) | 7.9390 ± 0.398[1] mas |
| Distance | 410 ± 20 ly (126 ± 6 pc) |
| Absolute magnitude (MV) | +0.21[6] |
| Details | |
| Mass | 3.47[1] M☉ |
| Radius | 2.8[1] R☉ |
| Luminosity | 185[1] L☉ |
| Surface gravity (log g) | 3.97[1] cgs |
| Temperature | 12,689[1] K |
| Rotational velocity (v sin i) | 115[7] km/s |
| Age | 38[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
72 Tauri (abbreviated 72 Tau) is a possible binary star in the zodiac constellation of Taurus. It is faintly visible to the naked eye with an apparent visual magnitude of +5.5, although only 0.29° from the brighter υ Tauri. Based upon an annual parallax shift of 7.9 mas seen from Earth, it is around 410 light years from the Sun.
Properties
72 Tauri is a B-type main sequence star with a stellar classification of B7V.[3] With a mass of 3.48 M☉ and an estimated age of 38 million years,[8] it is 2.8 times the size of the Sun and 185 times its luminosity.[1]
Occasionally this star system is given the Bayer designation υ2 Tauri with υ Tauri, which is separated from it by 0.29° in the sky.[4] υ Tauri is a foreground star, the two are unrelated,[11] and although 72 Tauri lies near the Hyades open cluster, it is much further away.[1]
72 Tauri lies near the ecliptic and can be occulted by the moon. Observations of an occultation in 1985 showed that it was a binary star with the two components separated by 0.1″.[12] There has been no confirmation of this finding and other sources list the star as single.[13]
References
- ↑ Jump up to: 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. Bibcode: 2000A&A...355L..27H.
- ↑ Jump up to: 3.0 3.1 Mooley, Kunal et al. (July 2013). "B- and A-type Stars in the Taurus-Auriga Star-forming Region". The Astrophysical Journal 771 (2): 24. doi:10.1088/0004-637X/771/2/110. 110. Bibcode: 2013ApJ...771..110M.
- ↑ Jump up to: 4.0 4.1 4.2 Hoffleit, D.; Jaschek, C. (1991). The Bright Star Catalogue. New Haven: Yale University Observatory. Bibcode: 1991bsc..book.....H.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G.
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ Freire Ferrero, R. et al. (February 2012). "High Ionization Species in the Nearby Interstellar Medium from an Exhaustive Analysis of the IUE INES Database". The Astronomical Journal 143 (2): 38. doi:10.1088/0004-6256/143/2/28. 28. Bibcode: 2012AJ....143...28F.
- ↑ Jump up to: 8.0 8.1 Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (25 July 2016). "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars". The Astronomical Journal 152 (2): 40. doi:10.3847/0004-6256/152/2/40. Bibcode: 2016AJ....152...40G.
- ↑ "72 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=72+Tau.
- ↑ Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)". VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002) 4027. Bibcode: 2004yCat.4027....0K.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Qian, B. -C; Zhu, G. -L.; Fan, Q. -Y. (1987). "The measurements of stellar angular diameter by photoelectric observation of lunar occultation". Acta Astronomica Sinica 28: 45. Bibcode: 1987AcASn..28...39Q.
- ↑ 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.
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