Upsilon Scorpii

Source: Wikipedia, the free encyclopedia.
Not to be confused with U Scorpii.
υ Scorpii
Location of υ Scorpii (circled)
Observation data
J2000.0
Constellation Scorpius
Right ascension 17h 30m 45.83712s[1]
Declination −37° 17′ 44.9285″[1]
Apparent magnitude (V) 2.70[2]
Characteristics
Spectral type B2 IV[3]
U−B color index −0.854[2]
B−V color index −0.221[2]
Distance
580 ± 20 ly
(177 ± 6 pc)
Absolute magnitude (MV)−3.53[5]
Details
Myr
HR 6508, SAO 208896[8]
Database references
SIMBADdata

Upsilon Scorpii (υ Scorpii, abbreviated Upsilon Sco, υ Sco), formally named Lesath /ˈliːsæθ/,[9] is a star located in the "stinger" of the southern zodiac constellation of Scorpius, the scorpion. Based on parallax measurements obtained during the Hipparcos mission, it is approximately 580 light-years from the Sun.[1] In the night sky it lies near the 1.6 magnitude star Lambda Scorpii, and the two form an optical pair that is sometimes called the "Cat's Eyes".[10]

Nomenclature

υ Scorpii (Latinised to Upsilon Scorpii) is the star's Bayer designation.

It bore the traditional name Lesath (alternatively spelled Leschath, Lesuth), from the

M7. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[11] to catalogue and standardize proper names for stars. The WGSN approved the name Lesath for this star on 21 August 2016 and it is now so included in the List of IAU-approved Star Names.[9]

Together with

Victoria named it as Karik Karik (together with Lambda Scorpii),[14] "the Falcons"[15]

In Chinese, 尾宿 (Wěi Xiù), meaning Tail, refers to an asterism consisting of Upsilon, Mu1, Epsilon,

Chinese name for Upsilon Scorpii itself is 尾宿九 (Wěi Xiù jiǔ), "the Ninth Star of Tail".[17]

Namesake

Crater class cargo ship
named after the star.

Properties

This star has

subgiant star. The star's luminosity is 12,300[18] times that of the Sun, while its surface temperature is 22,831[7] kelvins. The star has a radius of 6.1[7] times solar and 11[6] times the mass of the Sun
.

References

  1. ^
    S2CID 18759600
  2. ^
    doi:10.1086/190168
  3. ^
    Bibcode:1982mcts.book.....H
  4. Bibcode:1999VeARI..35....1W
  5. ^
    S2CID 119257644
    .
  6. ^
    S2CID 118629873
  7. ^
    doi:10.1093/mnras/189.3.601
  8. ^ "ups Sco -- Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2012-01-01
  9. ^ a b "Naming Stars". IAU.org. Retrieved 18 June 2018.
  10. ISBN 978-0-471-69657-5
  11. ^ IAU Working Group on Star Names (WGSN), International Astronomical Union, retrieved 22 May 2016.
  12. Bibcode:1998JBAA..108....9R
  13. ISBN 978-0-486-23673-5
    .
  14. S2CID 118454721
    .
  15. ^ Stanbridge, WM (1857). "On the Astronomy and Mythology of the Aboriginies of Victoria" (PDF). Transactions Philosophical Institute Victoria. 2: 137–140. Archived from the original (PDF) on 2013-06-02.
  16. ISBN 978-986-7332-25-7
    .
  17. ^ (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.
  18. ^ Kaler, James B., "LESATH (Upsilon Scorpii)", Stars, University of Illinois, retrieved 2012-01-28
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