Beta Sagittae
 Location of β Sagittae (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Sagitta |
| Right ascension | 19h 41m 02.9393s |
| Declination | +17° 28′ 33.748″ |
| Apparent magnitude (V) | 4.387 |
| Characteristics | |
| Spectral type | G8IIIa |
| U−B color index | +0.89 |
| B−V color index | +1.05 |
| R−I color index | +0.50 |
| Astrometry | |
| Radial velocity (Rv) | −22.4 ± 0.9 km/s |
| Proper motion (μ) |
RA: 9.06 mas/yr Dec.: −33.90 mas/yr |
| Parallax (π) | 7.42 ± 0.26mas |
| Distance | 440 ± 20 ly (135 ± 5 pc) |
| Absolute magnitude (MV) | −1.39+0.22 −0.20 |
| Details | |
| Radius | 10 R☉ |
| Surface gravity (log g) | 2.79 cgs |
| Temperature | 4,850 K |
| Metallicity [Fe/H] | –0.03 dex |
| Rotational velocity (v sin i) | 9.1±0.7 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Sagittae (Beta Sge, β Sagittae, β Sge) is a G-type giant star in the constellation of Sagitta. It has an apparent visual magnitude of approximately 4.387.
In Chinese, 左旗 (Zuǒ Qí), meaning Left Flag, refers to an asterism consisting of β Sagittae, α Sagittae, δ Sagittae, ζ Sagittae, γ Sagittae, 13 Sagittae, 11 Sagittae, 14 Sagittae and ρ Aquilae. Consequently, β Sagittae itself is known as 左旗二 (Zuǒ Qí èr, English: the Second Star of Left Flag.)
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