| Observation data EpochJ2000.0 EquinoxJ2000.0 (ICRS) | |
|---|---|
| Constellation | Grus |
| Right ascension | 21h 32m 05.87583s[1] |
| Declination | −41° 10′ 45.5242″[1] |
| Apparent magnitude (V) | 5.29[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| B−Vcolor index | +1.10[2] |
| Astrometry | |
| Radial velocity (Rv) | −9.81±0.13[1] km/s |
| Proper motion (μ) | RA: +19.427[1]mas/yr Dec.: +11.278[1]mas/yr |
| Parallax (π) | 7.5904±0.1226 mas[1] |
| Distance | 430 ± 7 ly (132 ± 2 pc) |
| Absolute magnitude (MV) | −0.47[4] |
| Details | |
| Radius | 19.2±0.6[1] R☉ |
| Luminosity | 161.7±3.1[1] L☉ |
| Temperature | 4,703+76 −74[1] K |
| Other designations | |
| ξ Gru,CD−41° 14550,FK5 3719,HD 204783,HIP 106327,HR 8229,SAO 230726[5] | |
| Database references | |
| SIMBAD | data |
ξ Gruis, Latinised asXi Gruis, is a solitary[6]star in thesouthernconstellation ofGrus, near the constellation border withMicroscopium. It is visible to the naked eye as a dim, orange-hued star with anapparent visual magnitude of 5.3.[2] The star is located about 430 light-years distant from theSun, based onparallax, but is drifting closer with aradial velocity of −10 km/s.[1]
This is anevolvedgiant star with astellar classification of K0 III,[3] having exhausted the supply of hydrogen at itscore then cooled and expanded. It now has 19 times thegirth of the Sun and is radiating 12 times theSun's luminosity from its enlargedphotosphere at aneffective temperature of4,703 K.[1]
