Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Columba |
Right ascension | 06h 32m 21.3775s[1] |
Declination | −37° 41′ 48.2053″[1] |
Apparent magnitude (V) | 5.25±0.01[2] |
Characteristics | |
Spectral type | G8 III[3] |
U−B color index | +0.75[4] |
B−V color index | +0.98[5] |
Astrometry | |
Radial velocity (Rv) | 39±1[6] km/s |
Proper motion (μ) | RA: +73.075 mas/yr[1] Dec.: −75.599 mas/yr[1] |
Parallax (π) | 11.4692 ± 0.0782 mas[1] |
Distance | 284 ± 2 ly (87.2 ± 0.6 pc) |
Absolute magnitude (MV) | +0.64[7] |
Details[8] | |
Mass | 1.94±0.11 M☉ |
Radius | 10.66±0.18 R☉ |
Luminosity | 60.7±1.4 L☉ |
Surface gravity (log g) | 2.69±0.07 cgs |
Temperature | 4,935±29 K |
Metallicity [Fe/H] | −0.16±0.02 dex |
Rotational velocity (v sin i) | 1.2±1.2[9] km/s |
Age | 1.68[10] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
HD 46568 (HR 2399) is a solitary[13] star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.25.[2] Parallax measurements place the object at a distance of 284 light years[1] and is currently receding with a heliocentric radial velocity of 39 km/s.[6]
HD 46568 has a stellar classification of G8 III, indicating that it is a yellow giant. At present it has nearly twice the mass of the Sun[8] but at an age of 1.68 billion years[10] it has expanded to 10.66 times the radius of the Sun.[8] It has an effective temperature of 4,935 K,[8] giving it a yellow glow. However, the star's large radius yields a luminosity 60 times that of Sun.[8] HD 46568's metallicity is 69% that of the Sun[8] and it spins with a poorly constrained projected rotational velocity of 1.2 km/s.[9]