| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 19h25m 29.65949s[1] |
| Declination | −23° 57′ 44.8390″[1] |
| Apparent magnitude (V) | +5.448[2] |
| Characteristics | |
| Spectral type | K3 III[3] |
| U−B color index | +1.662[2] |
| B−V color index | +1.443[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | +39.6[5] km/s |
| Proper motion (μ) | RA: −18.66[1] mas/yr Dec.: −12.73[1] mas/yr |
| Parallax (π) | 6.53 ± 0.42 mas[1] |
| Distance | 500 ± 30 ly (153 ± 10 pc) |
| Absolute magnitude (MV) | −0.46[6] |
| Details | |
| Radius | 37[7] R☉ |
| Luminosity | 301[8] L☉ |
| Surface gravity (log g) | 1.860[9] cgs |
| Temperature | 4,040[9] K |
| Metallicity [Fe/H] | −0.10[9] dex |
| Other designations | |
Chi3 Sgr, 49 Sgr, NSV 11992, CPD−24° 6723, HD 182416, HIP 95503, HR 7363, SAO 188105[10] | |
| Database references | |
| SIMBAD | data |
Chi3 Sagittarii (χ3 Sagittarii) is a solitary,[11] orange-hued star in the zodiac constellationofSagittarius. It is faintly visible to the naked eye with an apparent visual magnitude of +5.45.[2] Based upon an annual parallax shift of 6.53 mas as seen from Earth,[1] 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.[5]
This is an evolved, K-type giant star with a stellar classification of K3 III.[3] It is a suspected optical variable star with a magnitude range of 5.42 to 5.46.[4]Atinfrared wavelengths, it shows large amplitude variation with a period of 505 days.[12] The star has expanded to about 37[7] times the Sun's radius and is radiating 301[8] times the solar luminosity from its photosphere at an effective temperature of 4,040 K.[9]
{{cite web}}: CS1 maint: postscript (link)
