5 Tauri

5 Tauri
Location of 5 Tauri (circled in red)
Observation data
Epoch J2000      Equinox ICRS
Constellation Taurus
Right ascension 03h 30m 52.38296s
Declination +12° 56′ 12.0489″
Apparent magnitude (V) +4.14
Characteristics
Spectral type K0-III
U−B color index +0.95
B−V color index +1.09
Astrometry
Radial velocity (Rv)14.2±0.3 km/s
Proper motion (μ) RA: 13.537 mas/yr
Dec.: -2.037 mas/yr
Parallax (π)6.1081±0.3907 mas
Distance530 ± 30 ly
(160 ± 10 pc)
Absolute magnitude (MV)−0.96
Orbit
Primary5 Tauri A
Secondary5 Tauri B
Period (P)960 days
Semi-major axis (a)4.25 mas
Eccentricity (e)0.397±0.016
Inclination (i)36.95°
Longitude of the node (Ω)207.61°
Periastron epoch (T)2,414,889.565±5.82
Argument of periastron (ω)
(secondary)		326.32±2.99°
Semi-amplitude (K1)
(primary)		8.25±0.15 km/s
Details
5 Tauri A
Mass4.0±0.7 M☉
Radius8.5 R☉
Luminosity329.38 L☉
Surface gravity (log g)1.97 cgs
Temperature4,644 K
Metallicity [Fe/H]0.05 dex
Rotational velocity (v sin i)10 km/s
5 Tauri B
Mass1.13±0.13 M☉
Other designations
f Tau, 5 Tau, BD+12°486, FK5 125, GC 4184, HD 21754, HIP 16369, HR 1066, SAO 93469, TYC 656-1725-1
Database references
SIMBADdata

5 Tauri is a binary star in the zodiac constellation of Taurus, located approximately 530 light years from the Sun. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of +4.14. It is moving further from the Earth with a heliocentric radial velocity of +14 km/s.

This is a spectroscopic binary with a period of 960 days and an eccentricity of about 0.4. The primary component is a K-type giant with a stellar classification of K0-III. It has four times the mass of the Sun and is radiating 329 times the Sun's luminosity from its photosphere at an effective temperature of 4,644 K.

References

  1. 1 2 3 4 5 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. 1 2 3 4 5 6 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.
  3. 1 2 Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series. 71: 245. Bibcode:1989ApJS...71..245K. doi:10.1086/191373.
  4. 1 2 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. 1 2 Harper, W. E. (June 1924). "The orbit of the spectroscopic binary 5 Tauri". Publications of the Dominion Observatory Ottawa. 3: 145–149. Bibcode:1924PDAO....3..145H.
  6. 1 2 3 4 ESA (1997). "The Hipparcos and Tycho Catalogues". VizieR On-line Data Catalog. Bibcode:1997yCat.1239....0E.
  7. 1 2 Pourbaix, D.; Boffin, H. M. J. (February 2003), "Reprocessing the Hipparcos Intermediate Astrometric Data of spectroscopic binaries. II. Systems with a giant component", Astronomy and Astrophysics, 398 (3): 1163–1177, arXiv:astro-ph/0211483, Bibcode:2003A&A...398.1163P, doi:10.1051/0004-6361:20021736, S2CID 12361870
  8. ↑ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  9. 1 2 3 4 Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
  10. ↑ Bernacca, P. L.; Perinotto, M. (1970). "A catalogue of stellar rotational velocities". Contributi Osservatorio Astronomico di Padova in Asiago. 239 (1): 1. Bibcode:1970CoAsi.239....1B.
  11. ↑ "5 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 December 2016.