Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Taurus |
Right ascension | 03h 45m 09.73954s[1] |
Declination | +24° 50′ 21.3495″[1] |
Apparent magnitude (V) | 5.66[2] |
Characteristics | |
Evolutionary stage | main sequence[3] |
Spectral type | B8 V[4] |
B−V color index | −0.064±0.012[2] |
Astrometry | |
Radial velocity (Rv) | +4.8±0.8[5] km/s |
Proper motion (μ) | RA: +20.744[1] mas/yr Dec.: −46.538[1] mas/yr |
Parallax (π) | 7.3405 ± 0.1237 mas[1] |
Distance | 444 ± 7 ly (136 ± 2 pc) |
Absolute magnitude (MV) | 0.19[2] |
Details | |
Mass | 3.34±0.06[3] M☉ |
Radius | 2.89[6] R☉ |
Luminosity | 160+18 −15[3] L☉ |
Surface gravity (log g) | 4.126±0.113[7] cgs |
Temperature | 13,748±223[7] K |
Rotational velocity (v sin i) | 212[3] km/s |
Other designations | |
Database references | |
SIMBAD | data |
18 Tauri is a single[9] star in the zodiac constellation of Taurus, located 444 light years away from the Sun. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 5.66.[2] The star is moving further from the Earth with a heliocentric radial velocity of +4.8.[5] It is a member of the Pleiades[10] open cluster, which is positioned near the ecliptic and thus is subject to lunar occultations.[11]
This is a B-type main-sequence star with a stellar classification of B8 V,[4] and is about halfway through its main sequence lifetime.[3] It displays an infrared excess, suggesting the presence of an orbiting debris disk with a black body temperature of 75 K at a separation of 137.8 AU from the host star.[6] The star has 3.34[3] times the mass of the Sun and 2.89[6] times the Sun's radius. It is radiating 160[3] times the Sun's luminosity from its photosphere at an effective temperature of 13,748 K.[7] 18 Tauri has a high rate of spin, showing a projected rotational velocity of 212 km/s.[3]