6 Sagittarii

6 Sagittarii is a massive, orange-hued star in the southern zodiac constellation of Sagittarius. With an apparent visual magnitude of 6.27,^[2] it is just below the nominal brightness limit for visibility with the typical naked eye under ideal viewing conditions. The distance can be estimated from the annual parallax shift of 1.24±0.44 mas^[1] as roughly 2,600 light years away. It is moving closer to the Sun with a heliocentric radial velocity of −22 km/s.^[2] 6 Sagittarii has a peculiar velocity of 31.8+9.9
−14.1 km/s, which may indicate it is a runaway star.^[5]

6 Sagittarii

Observation data Epoch J2000      Equinox J2000
Constellation	Sagittarius
Right ascension	18h 01m 23.12190s[1]
Declination	−17° 09′ 24.7302″[1]
Apparent magnitude (V)	6.27[2]
Characteristics
Spectral type	K2 III[3]
B−V color index	1.763±0.010[4]
Astrometry
Radial velocity (Rv)	−22.0±4.3[2] km/s
Proper motion (μ)	RA: −0.86[1] mas/yr Dec.: −7.15[1] mas/yr
Parallax (π)	1.24±0.44 mas[1]
Distance	approx. 2,600 ly (approx. 800 pc)
Details
Mass	10.6±1.9[5] M☉
Luminosity	6,816.79[6] L☉
Temperature	3,778[6] K
Age	25.1±3.8[5] Myr
Other designations
6 Sgr, BD−17° 4987, FK5 1470, HD 164358, HIP 88258, HR 6715, SAO 160998[7]
Database references
SIMBAD	data

This is an evolved giant star with a stellar classification of K2 III.^[3] It is only 25^[5] million years old and has around ten times the mass of the Sun.^[5] The star is radiating about 6,817 times the Sun's luminosity from its photosphere at an effective temperature of 3,778 K.^[6] It appears to be a source of extended infrared excess, but this emission may be due to intervening cirrus.^[8]