Psi Tauri

Psi Tauri
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Taurus
Right ascension 04h 07m 00.45697s[1]
Declination +29° 00′ 04.7084″[1]
Apparent magnitude (V) +5.22[2]
Characteristics
Evolutionary stage main sequence
Spectral type F1 V[3]
U−B color index −0.01[2]
B−V color index +0.34[2]
Astrometry
Radial velocity (Rv)+9.15±0.42[1] km/s
Proper motion (μ) RA: −91.40[4] mas/yr
Dec.: +7.58[4] mas/yr
Parallax (π)36.2231 ± 0.1714 mas[1]
Distance90.0 ± 0.4 ly
(27.6 ± 0.1 pc)
Absolute magnitude (MV)3.01[5]
Details
Mass1.59[5] M☉
Radius1.59+0.16
−0.06[1] R☉
Luminosity5.12±0.03[1] L☉
Surface gravity (log g)4.36±0.14[5] cgs
Temperature6885+137
−313[1] K
Metallicity [Fe/H]−0.20[6] dex
Rotational velocity (v sin i)45.4±2.3[7] km/s
Age1.435[5] Gyr
Other designations
ψ Tau, 42 Tau, BD+28° 619, FK5 2295, HD 25867, HIP 19205, HR 1269, SAO 76461[8]
Database references
SIMBADdata

Psi Tauri, which is Latinized from ψ Tauri, is a solitary[9] star in the zodiac constellation of Taurus. It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of +5.22.[2] The distance to this system, as determined using an annual parallax shift of 36.2 mas as seen from the Earth,[4] is 90 light years. It is drifting further away with a radial velocity of +9 km/s.[1]

This object is an F-type main sequence star with a stellar classification of F1 V,[3] which indicates it is undergoing core hydrogen fusion. It is about 1.4 billion years old and is spinning with a projected rotational velocity of 45 km/s.[7] The star has 1.6 times the mass[5] and radius of the Sun.[1] It is radiating 4.8 times the Sun's luminosity from its photosphere at an effective temperature of 7,088 K.[5]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Landolt1967 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Cowley1974 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference AmmlerVonEiff2012 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).