37 Tauri

This article is about A1 Tauri. For other stars with this Bayer designation, see A Tauri.
37 Tauri
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 04h 04m 41.71484s[1]
Declination +22° 04′ 54.9243″[1]
Apparent magnitude (V) 4.36[2]
Characteristics
Spectral type K0 III-IIIb[3]
U−B color index 0.95[4]
B−V color index 1.07[5]
R−I color index 0.53[4]
Astrometry
Radial velocity (Rv)+9.52±0.11[6] km/s
Proper motion (μ) RA: +90.53[1] mas/yr
Dec.: −59.47[1] mas/yr
Parallax (π)17.43 ± 0.21 mas[1]
Distance187 ± 2 ly
(57.4 ± 0.7 pc)
Absolute magnitude (MV)0.57[2]
Details
Mass1.99[5] M☉
Radius10.15±0.69[7] R☉
Luminosity60±6[7] L☉
Surface gravity (log g)2.77[7] cgs
Temperature4,732±26[5] K
Metallicity [Fe/H]+0.01[7] dex
Rotational velocity (v sin i)2.8[6] km/s
Age1.39[5] Gyr
Other designations
37 Tau, BD+21° 585, FK5 1112, HD 25604, HIP 19038, HR 1256, SAO 76430, WDS J04047+2205A[8]
Database references
SIMBADdata

37 Tauri is a single,[9] orange-hued star in the zodiac constellation of Taurus. It can be seen with the naked eye, having an apparent visual magnitude of 4.36.[2] A magnitude 10.01 visual companion has an angular separation of 134.30″ on a position angle of 138.6°, as of 2003.[10] Based on an annual parallax shift of 17.43±0.21 mas,[1] 37 Tauri is about 187 light years away. It is moving further from the Sun with a heliocentric radial velocity of 9.5 km/s.[6]

This is an evolved K-type giant star with a stellar classification of K0 III-IIIb.[3] At the age of 1.39[5] billion years, it has become a red clump giant, indicating that it is generating energy through helium fusion at its core.[11] The star has around double the mass of the Sun and has expanded to 10[7] times the Sun's radius. It is radiating roughly 60[7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,732 K.[5]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference ducati2002 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference Piau2010 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Puzeras2010 was invoked but never defined (see the help page).