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Gamma Tauri

γ Tauri
Location of γ Tauri (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 04h 19m 47.6037s[1]
Declination +15° 37′ 39.512″[1]
Apparent magnitude (V) 3.654[2]
Characteristics
Spectral type G8III[3]
U−B color index +0.84[4]
B−V color index +0.99[4]
Astrometry
Radial velocity (Rv)38.7 ± 0.9[5] km/s
Proper motion (μ) RA: +115.29[1] mas/yr
Dec.: -23.86[1] mas/yr
Parallax (π)21.17 ± 1.17 mas[1]
Distance154 ± 9 ly
(47 ± 3 pc)
Absolute magnitude (MV)0.22[3]
Details
Mass2.70 ± 0.13[6] M☉
Radius13.4 ± 0.2[7] R☉
Luminosity85[3] L☉
Surface gravity (log g)2.58-2.61[7] cgs
Temperature4,844 ± 47[7] K
Metallicity [Fe/H]+0.11[8] dex
Rotation253 days[9]
Rotational velocity (v sin i)4[10] km/s
Age430–530[3][6] Myr
Other designations
Prima Hyadum, Hyadum I,[11] 54 Tauri, BD+15°612, FK5 159, HD 27371, HIP 20205, HR 1346, SAO 93868, GC 5226, WDS 04198+1538[2]
Database references
SIMBADdata

Gamma Tauri (γ Tauri, abbreviated Gamma Tau, γ Tau) is either a solitary, binary or double star (the Washington Double Star Catalog notes it as a "Dubious Double" or "Bogus Binary"[12]) that marks the tip of the "V" in the constellation of Taurus. It is a member of, and located within about 2.5 parsecs of the center of, the Hyades star cluster, the nearest open cluster to the Sun. Based upon parallax measurements, Gamma Tauri is approximately 154 light-years from the Sun.

Considered as a pair of stars, the two components are designated Gamma Tauri A (officially named Prima Hyadum /ˌpraɪmə ˈhaɪədəm/, the traditional name for the system)[13] and B.

  1. ^ a b c d e Cite error: The named reference hipparcos was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference pasj60 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference yerkes53 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference aaa458 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference apj691 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa480_1_91 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aaa421_241 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference coapa239_1 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference hinckley was invoked but never defined (see the help page).
  12. ^ "Washington Double Star Catalog". United States Naval Observatory. Archived from the original on 14 February 2011. Retrieved 2 January 2018.
  13. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.
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