18 Tauri

18 Tauri
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]
Distance444 ± 7 ly
(136 ± 2 pc)
Absolute magnitude (MV)0.19[2]
Details
Mass3.34±0.06[3] M☉
Radius2.89[6] R☉
Luminosity160+18
−15[3] L☉
Surface gravity (log g)4.126±0.113[7] cgs
Temperature13,748±223[7] K
Rotational velocity (v sin i)212[3] km/s
Other designations
18 Tau, BD+24°546, GC 4485, HD 23324, HIP 17527, HR 1144, SAO 76137[8]
Database references
SIMBADdata

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]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Morgan1973 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Cotten2016 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference David2015 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggen1998 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Meyer1995 was invoked but never defined (see the help page).