G Scorpii

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
G Scorpii
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]
Spectral type K2 III[3]
U−B color index +1.19[2]
B−V color index +1.17[2]
Radial velocity (Rv)+24.7[4] km/s
Proper motion (μ) RA: 40.59[1] mas/yr
Dec.: 27.24[1] mas/yr
Parallax (π)25.92 ± 0.15[1] mas
Distance125.8 ± 0.7 ly
(38.6 ± 0.2 pc)
Absolute magnitude (MV)+0.24[5]
Mass1.44 ± 0.21[6] M
Radius16[7] R
Luminosity95 ± 6[6] L
Temperature4,538[6] K
Other designations
Fuyue, G Sco, CD–37 11907, FK5 669, HD 161892, HIP 87261, HR 6630, SAO 209318.
Database references

G Scorpii (abbreviated G Sco), also named Fuyue,[8] is a star in the constellation of Scorpius. It has an apparent magnitude of +3.19. It is approximately 126 light-years from the Sun.[1]


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). It was resited in Scorpius and redesignated G Scorpii by Gould.[9])

It 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. G Scorpii is a member of the Tail mansion (尾宿, pinyin: Wěi Xiù), one of the twenty-eight mansions of the Chinese constellations. In 2016, the IAU organized a Working Group on Star Names (WGSN)[10] 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.[8]


G Scorpii is an orange K-type giant. The measured angular diameter is 3.94 ± 0.21 mas.[11] At the estimated distance of this system, this yields a physical size of about 16 times the radius of the Sun.[7]

Just 8.5 arcminutes to the east is the globular cluster NGC 6441.

See also[edit]


  1. ^ a b c d e f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
  2. ^ a b c Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
  3. ^ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637.
  4. ^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953GCRV..C......0W.
  5. ^ Cardini, D. (January 2005), "Mg II chromospheric radiative loss rates in cool active and quiet stars", Astronomy and Astrophysics, 430: 303–311, arXiv:astro-ph/0409683, Bibcode:2005A&A...430..303C, doi:10.1051/0004-6361:20041440.
  6. ^ a b c Stello, D.; et al. (2008), "Oscillating K Giants with the WIRE Satellite: Determination of Their Asteroseismic Masses", The Astrophysical Journal Letters, 674 (1): L53–L56, arXiv:0801.2155, Bibcode:2008ApJ...674L..53S, doi:10.1086/528936.
  7. ^ a b Lang, Kenneth R. (2006), Astrophysical formulae, Astronomy and astrophysics library, 1 (3rd ed.), Birkhäuser, ISBN 3540296921. The radius (R*) is given by:
  8. ^ a b "Naming Stars". IAU.org. Retrieved 16 December 2017.
  9. ^ Wagman, Morton (2003). Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, Virginia: The McDonald & Woodward Publishing Company. ISBN 978-0-939923-78-6.
  10. ^ "IAU Working Group on Star Names (WGSN)". Retrieved 22 May 2016.
  11. ^ Richichi, A.; Percheron, I.; Khristoforova, M. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics, 431 (2): 773–777, Bibcode:2005A&A...431..773R, doi:10.1051/0004-6361:20042039