75 Tauri

75 Tauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Taurus
Right ascension 04h 28m 26.37004s[1]
Declination +16° 21′ 34.8231″[1]
Apparent magnitude (V) 4.96[2]
Characteristics
Spectral type K1 IIIb[2]
B−V color index 1.137[3]
Astrometry
Radial velocity (Rv)+16.24±0.20[4] km/s
Proper motion (μ) RA: +7.91[1] mas/yr
Dec.: +18.14[1] mas/yr
Parallax (π)17.47 ± 0.42 mas[1]
Distance187 ± 4 ly
(57 ± 1 pc)
Absolute magnitude (MV)1.18[3]
Details[3]
Mass1.53±0.23 M☉
Radius11[5] R☉
Luminosity40.74+2.02
−1.92 L☉
Surface gravity (log g)2.81±0.28 cgs
Temperature4,697±60 K
Metallicity [Fe/H]−0.08±0.11 dex
Rotational velocity (v sin i)2.5[5] km/s
Age2.7+1.0
−1.5 Gyr
Other designations
75 Tau, BD+16° 605, HD 28292, HIP 20877, HR 1407, SAO 93950, WDS J04284+1622AB[6]
Database references
SIMBADdata

75 Tauri is a single,[7] orange-hued star in the zodiac of constellation Taurus. It is a dim star but visible to the naked eye with an apparent visual magnitude of 4.96.[2] Based upon an annual parallax shift of 17.47 mas as seen from Earth's orbit, it is located around 187 light years away. Due to its position near the ecliptic, it is subject to lunar occultations.[8] The star is moving further from the Sun with a heliocentric radial velocity of +16 km/s.[4]

The stellar classification of 75 Tauri is K1 IIIb,[2] indicating it is an aging giant star that has exhausted the supply of hydrogen at its core. At the estimated age of roughly 2.7 billion years,[3] this has become a red clump star that is generating energy through helium fusion in its core region.[9] The star has 1.5 times the mass of the Sun and has expanded to 11 times the Sun's radius. It is radiating 41 times the Sun's luminosity from its enlarged photosphere at an effective temperature of around 4,697 K.[3]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference DaSilva2015 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  6. ^ "75 Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-22.
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Evans1981 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Tautvaisiene2010 was invoked but never defined (see the help page).