| |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Taurus |
| Right ascension | 03h56m 52.077s[1] |
| Declination | +22° 28′ 40.70″[1] |
| Apparent magnitude (V) | 5.62[2] |
| Characteristics | |
| Spectral type | F2IVs[3] |
| U−B color index | +0.00[4] |
| B−V color index | +0.345±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | +31.90[5] km/s |
| Proper motion (μ) | RA: +70.674 mas/yr[1] Dec.: −114.026 mas/yr[1] |
| Parallax (π) | 22.5957 ± 0.0385 mas[1] |
| Distance | 144.3 ± 0.2 ly (44.26 ± 0.08 pc) |
| Absolute magnitude (MV) | 2.42[6] |
| Details | |
| Mass | 2.04[7] M☉ |
| Radius | 2.75[7] R☉ |
| Luminosity | 15.4[7] L☉ |
| Surface gravity (log g) | 3.87[7] cgs |
| Temperature | 6.901[7] K |
| Metallicity [Fe/H] | −0.19[8] dex |
| Rotational velocity (v sin i) | 19.7[9] km/s |
| Age | 2.1[10] Gyr |
| Other designations | |
BD+22°605, FK5 2283, HD 24740, HIP 18471, HR 1218, SAO 76339, Ross 33.[11] | |
| Database references | |
| SIMBAD | data |
32 Tauri is the Flamsteed designation for a solitary[12] star in the zodiac constellationofTaurus. It has a visual magnitude of 5.64,[4] making it visible to the naked eye from suburban skies (according to the Bortle scale). The position of this star near the ecliptic plane means that it is subject to occultations by the Moon.[13] Parallax measurements put it at a distance of 144 light years from the Sun.[1] It is drifting further away with a radial velocity of +31.9[5] km/s, having come to within 88.9 light-years some 759,000 years ago.[2]
The spectrum of this star matches a stellar classification of F2IVs,[3] with the luminosity class of IV indicating that this star has reached the subgiant stage and is in the process of evolving into a giant star. It has twice the mass of the sun with nearly three times the Sun's radius, but 15 times the Sun's luminosity[7] and about half the Sun's age.[10] The abundance of elements other than hydrogen and helium is lower in this star than in the Sun.[10] The effective temperature of the star's outer atmosphereis6901 K,[7] giving it the white-hued glow of an F-type star.[14]
