HD 123569
Star in the constellation Centaurus / From Wikipedia, the free encyclopedia
HD 123569 is a single[6] star in the southern constellation of Centaurus, positioned near the eastern constellation border with Lupus. This object has a yellowish hue and is visible to the naked eye with an apparent visual magnitude of 4.74.[2] It is located at a distance of approximately 176 light years from the Sun based on parallax, and it has an absolute magnitude of +1.00.[1] The star is drifting closer with a radial velocity of −17 km/s.[1] O. J. Eggen flagged this star as a member of the Hyades Supercluster.[7]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Centaurus |
Right ascension | 14h 09m 54.81470s[1] |
Declination | −53° 26′ 20.2220″[1] |
Apparent magnitude (V) | 4.74[2] |
Characteristics | |
Spectral type | G9-III[3] |
B−V color index | +0.938±0.004[2] |
Astrometry | |
Radial velocity (Rv) | −17.09±0.15[1] km/s |
Proper motion (μ) | RA: −145.400[1] mas/yr Dec.: −89.971[1] mas/yr |
Parallax (π) | 18.5021 ± 0.1699 mas[1] |
Distance | 176 ± 2 ly (54.0 ± 0.5 pc) |
Absolute magnitude (MV) | 1.00[1] |
Details | |
Radius | 8.25+0.24 −0.28[1] R☉ |
Luminosity | 40.242±0.441[1] L☉ |
Surface gravity (log g) | 3.13±0.08[4] cgs |
Temperature | 5,089±31[4] K |
Metallicity [Fe/H] | +0.07±0.03[4] dex |
Other designations | |
Database references | |
SIMBAD | data |
This is an aging giant star with a stellar classification of G9-III,[3] having exhausted the supply of hydrogen at its core then evolved off the main sequence by cooling and expanding. At present it has around 8.25[1] times the girth of the Sun, with a slightly higher than solar metallicity – what astronomers term the abundance of elements with a higher atomic number than helium.[4] The star is radiating 40 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5089 K.[1]