Taygeta

Coordinates: Sky map 03h 45m 12.49578s, +24° 28′ 02.2097″
Source: Wikipedia, the free encyclopedia.
Taygeta
Image of the Pleiades star cluster
Taygeta in the Pleiades cluster (circled)
Observation data
J2000.0
Constellation Taurus
Right ascension 03h 45m 12.49578s[1]
Declination +24° 28′ 02.2097″[1]
Apparent magnitude (V) 4.30[2]
Characteristics
Evolutionary stage subgiant[3]
Spectral type B6IV[4] + ?[5]
U−B color index −0.48[6]
B−V color index −0.12[6]
Distance
410 ± 20 ly
(125 ± 5 pc)
Details
Taygeta
Rotational velocity (v sin i)
105±16[8] km/s
19 Tauri Ab
Mass3.2[9] M☉
Luminosity150[9] L☉
Surface gravity (log g)4.2[8] cgs
Temperature8,306[8] K
HIP 17531, SAO 76140, GC 4486, BDS 1848, CCDM 03452+2429[10]
Database references
SIMBADdata

Taygeta is a double star in the constellation of Taurus and a member of the Pleiades open star cluster (M45).

It consists of a binary pair designated 19 Tauri A together with a single star visual companion, 19 Tauri B. 'A's' two components are themselves designated 19 Tauri Aa (officially named Taygeta /teɪˈɪdʒətə/,[11] the traditional name for the entire system)[12] and Ab.

Based on

light-years from the Sun
.

Nomenclature

19 Tauri is the system's Flamsteed designation. It also bears the little-used Bayer designation q Tauri. The designations of the two constituents as 19 Tauri A and B, and those of A's components - 19 Tauri Aa and Ab - derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted by the International Astronomical Union (IAU).[13]

The system bore the traditional name Taygeta (or Taygete).[14] Taygete was one of the Pleiades sisters in Greek mythology. In 2016, the IAU organized a Working Group on Star Names (WGSN)[15] to catalogue and standardize proper names for stars. The WGSN approved the name Taygeta for the component 19 Tauri Aa on 21 August 2016 and it is now so included in the List of IAU-approved Star Names.[12]

Properties

Taygeta has an

arcseconds and complete one orbit every 1313 days. The subgiant primary is one of just a handful of stars in the young Pleiades cluster that have evolved away from the main sequence.[3]

The 8th magnitude

visual companion, 19 Tauri B, is 69 arcseconds away. It is thought to be a yellow star somewhat more massive and larger than the Sun, and further away than the Pleiades cluster.[16]

Taygeta was once reported to be variable,[17] but has since been measured to be very nearly constant.[18][19]

References

  1. ^
    S2CID 18759600. Vizier catalog entry
  2. Bibcode:2002yCat.2237....0D
    .
  3. ^
    Bibcode:1989A&A...213L...1M
    .
  4. ^
    doi:10.1146/annurev.aa.11.090173.000333
    .
  5. S2CID 14878976
    .
  6. ^
    doi:10.1093/mnras/164.2.133
    .
  7. doi:10.3847/1538-4357/abb136
    .
  8. ^
    S2CID 119221178
    .
  9. ^ a b c Professor James B. (Jim) Kaler. "TAYGETA (19 Tauri)". University of Illinois. Retrieved 2014-08-18.
  10. ^ "* q Tau". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2014-08-18.
  11. Bibcode:1944PA.....52....8D
    .
  12. ^ a b "Naming Stars". IAU.org. Retrieved 5 March 2018.
  13. arXiv:1012.0707 [astro-ph.SR
    ].
  14. ^ Allen, Richard Hinckley (1899). Star-names and their meanings. G. E. Stechert. p. 407. Retrieved 2009-10-10.
  15. ^ "IAU Working Group on Star Names (WGSN)". International Astronomical Union. Retrieved 22 May 2016.
  16. S2CID 118621218
    .
  17. Bibcode:2009yCat....102025S
    .
  18. doi:10.1086/316577
    .
  19. doi:10.1051/0004-6361:20000567
    .
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