Psi Tauri
Psi Tauri, which is Latinized from ψ Tauri, is a solitary 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. The distance to this system, as determined using an annual parallax shift of 36.2 mas as seen from the Earth, is 90 light years. It is drifting further away with a radial velocity of +9 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Taurus |
| Right ascension | 04h 07m 00.45697s |
| Declination | +29° 00′ 04.7084″ |
| Apparent magnitude (V) | +5.22 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | F1 V |
| U−B color index | −0.01 |
| B−V color index | +0.34 |
| Astrometry | |
| Radial velocity (Rv) | +9.15±0.42 km/s |
| Proper motion (μ) | RA: −91.40 mas/yr Dec.: +7.58 mas/yr |
| Parallax (π) | 36.2231 ± 0.1714 mas |
| Distance | 90.0 ± 0.4 ly (27.6 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.01 |
| Details | |
| Mass | 1.59 M☉ |
| Radius | 1.59+0.16 −0.06 R☉ |
| Luminosity | 5.12±0.03 L☉ |
| Surface gravity (log g) | 4.36±0.14 cgs |
| Temperature | 6885+137 −313 K |
| Metallicity [Fe/H] | −0.20 dex |
| Rotational velocity (v sin i) | 45.4±2.3 km/s |
| Age | 1.435 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an F-type main sequence star with a stellar classification of F1 V, 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. The star has 1.6 times the mass and radius of the Sun. It is radiating 4.8 times the Sun's luminosity from its photosphere at an effective temperature of 7,088 K.