104 Tauri

104 Tauri
Observation data
Epoch J2000      Equinox J2000
Constellation Taurus
Right ascension 05h 07m 27.00529s[1]
Declination +18° 38′ 42.1815″[1]
Apparent magnitude (V) 4.92[2]
Characteristics
Spectral type G4V[3]
B−V color index 0.64[3]
Astrometry
Radial velocity (Rv)+20.19[3] km/s
Proper motion (μ) RA: +534.73[1] mas/yr
Dec.: +17.93[1] mas/yr
Parallax (π)64.79 ± 0.33 mas[1]
Distance50.3 ± 0.3 ly
(15.43 ± 0.08 pc)
Absolute magnitude (MV)3.75±0.06[4]
Details
Mass1.00+0.03
−0.04[4] M☉
Radius1.63±0.06[4] R☉
Luminosity2.41[5] L☉
Surface gravity (log g)4.06[2] cgs
Temperature5,717[2] K
Metallicity [Fe/H]−0.22[2] dex
Rotational velocity (v sin i)10.00[3] km/s
Age10.15[2] Gyr
Other designations
m Tau, 104 Tau, BD+18° 779, GJ 188, HD 32923, HIP 23835, HR 1656, SAO 94332[6]
Database references
SIMBADdata

104 Tauri (104 Tau) is the Flamsteed designation for a star in the equatorial constellation of Taurus. It has an apparent magnitude of 4.92, which is bright enough to be seen with the naked eye. Based upon parallax measurements, this star is located about 50 light-years from the Sun.[1] It is moving further from the Sun with a heliocentric radial velocity of +20 km/s.[3]

This star has a stellar classification of G4 V,[3] which suggests it is an ordinary G-type main-sequence star that is generating energy through hydrogen fusion at its stellar core. It is an estimated 10[2] billion years old and is spinning with a projected rotational velocity of 10 km/s.[3] The star has about the same mass as the Sun, with 1.6 times the Sun's radius.[4] It is radiating 2.4[5] times the Sun's luminosity from its photosphere at an effective temperature of 5,717 K.[2]

104 Tauri appears to have a modest barium enrichment compared to iron. This may indicate that the star had accreted stellar wind of a companion star in the asymptotic giant branch, which has since evolved into a white dwarf.[7]

The star displays convincing evidence for an infrared excess, suggesting the presence of a circumstellar debris disk of dust.[8]

  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 d e f g Cite error: The named reference apj764_1_78 was invoked but never defined (see the help page).
  3. ^ a b c d e f g Cite error: The named reference aj133_6_2524 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference bernkopf2006 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference 2017MNRAS.471.3768F was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference holmes2003 was invoked but never defined (see the help page).