HD 213240
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Grus |
| Right ascension | 22h 31m 00.36634s |
| Declination | −49° 25′ 59.7690″ |
| Apparent magnitude (V) | 6.81 |
| Characteristics | |
| Spectral type | G0/G1V + M5-5.5 |
| B−V color index | 0.603±0.005 |
| Astrometry | |
| Radial velocity (Rv) | −0.37±0.12 km/s |
| Proper motion (μ) | RA: −135.912 mas/yr Dec.: −193.844 mas/yr |
| Parallax (π) | 24.4247±0.0208 mas |
| Distance | 133.5 ± 0.1 ly (40.94 ± 0.03 pc) |
| Absolute magnitude (MV) | 3.77 |
| Details | |
| Mass | 1.57±0.02 M☉ |
| Radius | 1.56+0.03 −0.04 R☉ |
| Luminosity | 2.687+0.007 −0.006 L☉ |
| Surface gravity (log g) | 4.17±0.02 cgs |
| Temperature | 5,921+70 −58 K |
| Metallicity [Fe/H] | 0.14±0.01 dex |
| Rotational velocity (v sin i) | 3.5 km/s |
| Age | 4.6±0.6 Gyr |
| Other designations | |
| CD−50° 13701, HD 213240, HIP 111143, SAO 231175, LTT 9047 | |
| Database references | |
| SIMBAD | data |
HD 213240 is a possible binary star system in the constellation Grus. It has an apparent visual magnitude of 6.81, which lies below the limit of visibility for normal human sight. The system is located at a distance of 133.5 light years from the Sun based on parallax. The primary has an absolute magnitude of 3.77.
This is an ordinary G-type main-sequence star with a stellar classification of G0/G1V. It is a metal-rich star with an age that has been calculated as being anywhere from 2.7 to 4.6 billion years. The star has 1.6 times the mass of the Sun and 1.56 times the Sun's radius. It is spinning with a projected rotational velocity of 3.5 km/s. The star is radiating 2.69 times the luminosity of the Sun from its photosphere at an effective temperature of 5,921 K.
A red dwarf companion star was detected in 2005 with a projected separation of 3,898 AU.