G Scorpii

G Scorpii
Observation data
Epoch J2000      Equinox J2000
Constellation Scorpius
Right ascension 17h 49m 51.48081s[1]
Declination −37° 02′ 35.8975″[1]
3.21[2]
Characteristics
Spectral type K2 III[3]
U−B color index +1.19[2]
B−V color index +1.17[2]
Astrometry
Proper motion (μ) RA: 40.59[1] mas/yr
Dec.: 27.24[1] mas/yr
Parallax (π) 25.92 ± 0.15[1] mas
Distance 125.8 ± 0.7 ly
(38.6 ± 0.2 pc)
Details
Mass 1.44 ± 0.21[5] M
Luminosity 95 ± 6[5] L
Temperature 4,538[5] K
Other designations
G Sco, CD–37 11907, FK5 669, HD 161892, HIP 87261, HR 6630, SAO 209318.
Database references

G Scorpii (G Sco) is a star in the constellation Scorpius. It is an orange K-type giant with an apparent magnitude of +3.19. It is approximately 126 light years from Earth.[1] The measured angular diameter of the primary star is 3.94 ± 0.21 mas.[7] At the estimated distance of this system, this yields a physical size of about 16 times the radius of the Sun.[6]

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

It was formerly known as "Gamma Telescopii" (γ Tel) and "Fuyue" （傅說） in ancient China.

{\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(38.6\cdot 3.94\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 32.7\cdot R_{\bigodot }\end{aligned}}}