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Star in the constellation Taurus From Wikipedia, the free encyclopedia
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]
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] |
Distance | 90.0 ± 0.4 ly (27.6 ± 0.1 pc) |
Absolute magnitude (MV) | 3.01[5] |
Details | |
Mass | 1.59[5] M☉ |
Radius | 1.59+0.16 −0.06[1] R☉ |
Luminosity | 5.12±0.03[1] L☉ |
Surface gravity (log g) | 4.36±0.14[5] cgs |
Temperature | 6885+137 −313[1] K |
Metallicity [Fe/H] | −0.20[6] dex |
Rotational velocity (v sin i) | 45.4±2.3[7] km/s |
Age | 1.435[5] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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]
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