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Solitary star in the constellation Columba From Wikipedia, the free encyclopedia
HD 34266, also known as HR 1721 is a solitary,[13] yellow hued star located in the southern constellation Columba, the dove. It has an apparent magnitude of 5.73,[2] making it faintly visible to the naked eye under ideal conditions. Based on Gaia DR3 parallax measurements, the object is located 539 light years away.[1] It appears to be drifting away from the Solar System, having a heliocentric radial velocity of 13.2 km/s.[6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Columba |
Right ascension | 05h 14m 28.84578s[1] |
Declination | −35° 58′ 37.1904″[1] |
Apparent magnitude (V) | 5.73±0.01[2] |
Characteristics | |
Evolutionary stage | Red giant branch[3] |
Spectral type | G8 III[4] |
B−V color index | +1.01[5] |
Astrometry | |
Radial velocity (Rv) | 13.2±2.9[6] km/s |
Proper motion (μ) | RA: +11.005 mas/yr[1] Dec.: +13.944 mas/yr[1] |
Parallax (π) | 6.046 ± 0.0316 mas[1] |
Distance | 539 ± 3 ly (165.4 ± 0.9 pc) |
Absolute magnitude (MV) | −0.16[7] |
Details[8] | |
Mass | 3.42±0.14 M☉ |
Radius | 16.2±0.4 R☉ |
Luminosity | 144±4 L☉ |
Surface gravity (log g) | 2.68±0.12 cgs |
Temperature | 4,970±49 K |
Metallicity [Fe/H] | +0.04±0.04 dex |
Rotational velocity (v sin i) | 2.3±1.2[9] km/s |
Age | 490[10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is an evolved giant star that is currently on the red giant branch,[3] fusing hydrogen in a shell around an inert helium core. It has a stellar classification of G8 III.[4] HD 34266 is calculated to be 490 million years old,[10] almost 10 times younger than the Sun. However, it already left the main sequence due to a mass of 3.42 M☉.[8] HD 34266 has expanded to 16.2 times the Sun's girth and now radiates 144 times the luminosity of the Sun from its photosphere at an effective temperature of 4,970 K.[8] HD 34266 has a near solar metallicity and spins modestly with a projected rotational velocity of 2.3 km/s.[9]
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