G Scorpii

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G Scorpii
Location of G Scorpii (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 17h 49m 51.48081s[1]
Declination −37° 02′ 35.8975″[1]
Apparent magnitude (V) 3.21[2]
Characteristics
Evolutionary stage horizontal branch[3]
Spectral type K2 III[4]
U−B color index +1.19[2]
B−V color index +1.17[2]
Distance
125.8 ± 0.7 ly
(38.6 ± 0.2 pc)
Absolute magnitude (MV)+0.24[6]
Details
Rotational velocity (v sin i)
<1.0[8] km/s
HR 6630, SAO
 209318
Database references
SIMBADdata

G Scorpii (abbreviated G Sco), also named Fuyue, is a giant star in the constellation of Scorpius. It has an apparent magnitude of +3.19. It is approximately 126 light-years from the Sun.

Nomenclature

G Scorpii below and right (ie. west) of NGC 6441

G Scorpii is the star's Bayer designation. It was formerly situated in the constellation of Telescopium where it was designated γ Telescopii, Latinised to Gamma Telescopii.[9] It was resited in Scorpius and redesignated G Scorpii by Benjamin Apthorp Gould.[10]

In 2016, the IAU organized a

Working Group on Star Names (WGSN)[11] to catalog and standardize proper names for stars. The WGSN approved the name Fuyue for this star on 30 June 2017 and it is now so included in the List of IAU-approved Star Names.[12]

G Scorpii bore the

traditional name Fuyue (simplified Chinese: 傅说; traditional Chinese: 傅說) in ancient China. Fu Yue was a former slave that became a high-ranking minister to Shang dynasty ruler Wu Ding
.

Properties

G Scorpii is an orange

bolometric luminosity of 93 L☉.[3]

Evolutionary models show that G Scorpii has probably left the

red giant branch and is now fusing helium in its core. This makes it a red clump star, at the cool end of the horizontal branch.[3]

Just 5

arcminutes to the east is the globular cluster NGC 6441.[15]
At magnitude 3.2, G Scorpii is around 40 times brighter than the entire globular cluster.

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1966CoLPL...4...99J
    .
  3. ^
    S2CID 102486794
    .
  4. S2CID 119476992
    .
  5. Bibcode:1953GCRV..C......0W
    .
  6. S2CID 12136256
    .
  7. S2CID 204907220
    .
  8. S2CID 54046583
    .
  9. ^ Ian Ridpath, "Telescopium", Star Tales, retrieved 2020-05-23.
  10. ISBN 978-0-939923-78-6
    .
  11. ^ IAU Working Group on Star Names (WGSN), retrieved 22 May 2016.
  12. ^ Naming Stars, IAU.org, retrieved 16 December 2017.
  13. doi:10.1051/0004-6361:20042039
  14. ISBN 3540296921
    . The radius (R*) is given by:
  15. ISBN 978-1139851541
    .
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