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5 Tauri

Topic: Astronomy

 From HandWiki - Reading time: 3 min
Short description: Binary star system in the constellation Taurus
5 Tauri
Observation data
Equinox J2000.0]] (ICRS)
Constellation Taurus
Right ascension  03h 30m 52.38296s[1]
Declination +12° 56′ 12.0489″[1]
Apparent magnitude (V) +4.14[2]
Characteristics
Spectral type K0-III[3]
U−B color index +0.95[4]
B−V color index +1.09[4]
Astrometry
Radial velocity (Rv)14.2±0.3[2] km/s
Proper motion (μ) RA: 13.537[1] mas/yr
Dec.: -2.037[1] mas/yr
Parallax (π)6.1081 ± 0.3907[1] mas
Distance530 ± 30 ly
(160 ± 10 pc)
Absolute magnitude (MV)−0.96[2]
Orbit[5]
Primary5 Tauri A
Companion5 Tauri B
Period (P)960 days
Semi-major axis (a)4.25 mas[6]
Eccentricity (e)0.397±0.016
Inclination (i)36.95[6]°
Longitude of the node (Ω)207.61[6]°
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[7] M☉
Radius8.5[8] R☉
Luminosity329.38[2] L☉
Surface gravity (log g)1.97[9] cgs
Temperature4,644[9] K
Metallicity [Fe/H]0.05[9] dex
Rotational velocity (v sin i)10[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[11]
Database references
SIMBADdata

5 Tauri is a binary star[6] 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.[2]

This is a spectroscopic binary with a period of 960 days and an eccentricity of about 0.4.[5] The primary component is a K-type giant with a stellar classification of K0-III.[3] It has four[7] times the mass of the Sun and is radiating 329[2] times the Sun's luminosity from its photosphere at an effective temperature of 4,644 K.[9]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. (1989). "The Perkins catalog of revised MK types for the cooler stars". Astrophysical Journal Supplement Series 71: 245. doi:10.1086/191373. Bibcode: 1989ApJS...71..245K. 
  4. ↑ 4.0 4.1 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode: 1986EgUBV........0M. 
  5. ↑ 5.0 5.1 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. ↑ 6.0 6.1 6.2 6.3 ESA (1997). "The Hipparcos and Tycho Catalogues". VizieR On-line Data Catalog. Bibcode: 1997yCat.1239....0E. 
  7. ↑ 7.0 7.1 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, doi:10.1051/0004-6361:20021736, Bibcode: 2003A&A...398.1163P 
  8. ↑ Pasinetti Fracassini, L. E. et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics 367: 521–524, doi:10.1051/0004-6361:20000451, Bibcode: 2001A&A...367..521P. 
  9. ↑ 9.0 9.1 9.2 9.3 Earle Luck, R. (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal 147 (6): 137. doi:10.1088/0004-6256/147/6/137. Bibcode: 2014AJ....147..137L. 
  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. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=5+Tau. 

External links



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