11 Sagittae

11 Sagittae is a blue giant in the constellation Sagitta with a spectral type of B9III.

11 Sagittae

Location of 11 Sagittae (circled)
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Sagitta
Right ascension	19h 57m 45.44547s[1]
Declination	+16° 47′ 20.9781″[1]
Apparent magnitude (V)	5.53[2]
Characteristics
Spectral type	B9III[3]
Astrometry
Radial velocity (Rv)	−26.10±1.6[4] km/s
Proper motion (μ)	RA: 11.609[1] mas/yr Dec.: 18.605[1] mas/yr
Parallax (π)	7.5596±0.0600 mas[1]
Distance	431 ± 3 ly (132 ± 1 pc)
Details
Mass	2.47[2] M☉
Radius	4.02[2] R☉
Luminosity	127[2] L☉
Surface gravity (log g)	3.62[2] cgs
Temperature	9,661[2] K
Metallicity [Fe/H]	0.0[5] dex
Rotational velocity (v sin i)	34[6] km/s
Age	242[5] Myr
Other designations
11 Sge, BD+16°4081, HD 189090, HIP 98324, HR 7622, SAO 105471[3]
Database references
SIMBAD	data

Naming

It is in the Chinese asterism 左旗 (Zuǒ Qí), or Left Flag which consists of 11 Sagittae, γ Sagittae, α Sagittae, β Sagittae, δ Sagittae, ζ Sagittae, 13 Sagittae, 14 Sagittae and ρ Aquilae. Consequently, the Chinese name for γ Sagittae itself is 左旗七 (Zuǒ Qí qī, English: the Seventh Star of Left Flag).^{[citation needed]}