Chi3 Sagittarii
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h 25m 29.65949s |
| Declination | −23° 57′ 44.8390″ |
| Apparent magnitude (V) | +5.448 |
| Characteristics | |
| Spectral type | K3 III |
| U−B color index | +1.662 |
| B−V color index | +1.443 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | +39.6 km/s |
| Proper motion (μ) | RA: −18.66 mas/yr Dec.: −12.73 mas/yr |
| Parallax (π) | 6.53±0.42 mas |
| Distance | 500 ± 30 ly (153 ± 10 pc) |
| Absolute magnitude (MV) | −0.46 |
| Details | |
| Radius | 37 R☉ |
| Luminosity | 301 L☉ |
| Surface gravity (log g) | 1.860 cgs |
| Temperature | 4,040 K |
| Metallicity [Fe/H] | −0.10 dex |
| Other designations | |
| Chi3 Sgr, 49 Sgr, NSV 11992, CPD−24°6723, HD 182416, HIP 95503, HR 7363, SAO 188105 | |
| Database references | |
| SIMBAD | data |
Chi3 Sagittarii (χ3 Sagittarii) is a solitary, orange-hued star in the zodiac constellation of Sagittarius. It is faintly visible to the naked eye with an apparent visual magnitude of +5.45. Based upon an annual parallax shift of 6.53 mas as seen from Earth, it is located roughly 500 light years from the Sun. It is receding from the Earth with a radial velocity of 39.6 km/s.
This is an evolved, K-type giant star with a stellar classification of K3 III. It is a suspected optical variable star with a magnitude range of 5.42 to 5.46. At infrared wavelengths, it shows large amplitude variation with a period of 505 days. The star has expanded to about 37 times the Sun's radius and is radiating 301 times the solar luminosity from its photosphere at an effective temperature of 4,040 K.