Delta3 Tauri

For other stars with this Bayer designation, see δ Tauri.
Delta3 Tauri
Location of δ3 Tauri (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Taurus
Right ascension 04h 25m 29.38340s[1]
Declination +17° 55′ 40.4579″[1]
Apparent magnitude (V) +4.32 (4.35 + 8.37)[2]
Characteristics
Spectral type A2IV
Astrometry
Proper motion (μ) RA: +41.91[1] mas/yr
Dec.: −34.54[1] mas/yr
Parallax (π)21.96 ± 0.51 mas[1]
Distance149 ± 3 ly
(46 ± 1 pc)
Absolute magnitude (MV)+1.14[3]
Details
Mass2.27±0.23[4] M☉
Luminosity29.5[4] L☉
Surface gravity (log g)3.95[4] cgs
Temperature9,025[4] K
Rotational velocity (v sin i)11.3[4] km/s
Other designations
Cleeia, δ3 Tau, 68 Tauri, BD+17°719, HD 27962, HIP 20648, HR 1389, SAO 93923, ADS 3206[5]
Database references
SIMBADdata

Delta3 Tauri (δ3 Tauri) is a binary star[2] system in the zodiac constellation of Taurus. Based upon an annual parallax shift of 21.96 mas as seen from Earth,[1] it is located roughly 149 light years distant from the Sun. It is visible to the naked eye with a combined apparent visual magnitude of +4.32.[2] δ3 Tauri is separated from δ1 Tauri by 0.72° on the sky.[5] This star also has the traditional Latin name Cleeia,[6][7] from the Greek Kleeia (transliteration of Κλεεια),[8] who was one of the Hyades sisters. It is considered a member of the Hyades cluster.[4]

In Chinese, 畢宿 (Bì Xiù), meaning Net, refers to an asterism consisting δ3 Tauri, ε Tauri, δ1 Tauri, γ Tauri, Aldebaran, 71 Tauri and λ Tauri.[9] Consequently, the Chinese name for δ3 Tauri itself is 畢宿二 (Bì Xiù èr), "the Second Star of Net".[10]

The magnitude 4.35[2] primary, component A, appears to be an A-type subgiant star with a stellar classification of A2 IV. It is a candidate blue straggler and shows characteristics of an Am star. Abt (1985) gave it a classification of A2kA3hA5m, indicating that the spectrum displays the calcium K-line of an A2 star, the hydrogen lines of an A3 star and the metal lines of an A5 star. It is deficient in scandium but has enhanced iron peak and heavy elements.[4] Although suspected of variability in the past,[11] Delta3 Tauri A was subsequently determined to be photometrically constant.[12]

The companion, component B, is a magnitude 8.37[2] star at an angular separation of 1.80 arc seconds along a position angle of 341°, as of 2010. At 77 arcseconds away (as of 2006) is a magnitude 11.12 visual companion, designated component C.[13]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Eggen1998 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Gebran2010 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Falkner2011 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Bagnall2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Theoi was invoked but never defined (see the help page).
  9. ^ (in Chinese) 中國星座神話, written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.
  10. ^ (in Chinese) 香港太空館 - 研究資源 - 亮星中英對照表 Archived 2008-10-25 at the Wayback Machine, Hong Kong Space Museum. Accessed on line November 23, 2010.
  11. ^ Cite error: The named reference Kholopov1981 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Adelman1997 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).