18 Tauri

18 Tauri is a single^[9] star in the zodiac constellation of Taurus, located 452 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 km/s.^[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]

18 Tauri

18 Tauri in the Pleiades, circled in red
Observation data Epoch J2000      Equinox J2000
Constellation	Taurus
Right ascension	03h 45m 09.74013s[1]
Declination	+24° 50′ 21.3432″[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: +20.218[1] mas/yr Dec.: −46.124[1] mas/yr
Parallax (π)	7.2222±0.0551 mas[1]
Distance	452 ± 3 ly (138 ± 1 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
Age	204[1] Myr
Other designations
18 Tau, BD+24°546, GC 4485, HD 23324, HIP 17527, HR 1144, SAO 76137[8]
Database references
SIMBAD	data

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]