HD 123569

HD 123569
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]
Distance176 ± 2 ly
(54.0 ± 0.5 pc)
Absolute magnitude (MV)1.00[1]
Details
Radius8.25+0.24
−0.28[1] R☉
Luminosity40.242±0.441[1] L☉
Surface gravity (log g)3.13±0.08[4] cgs
Temperature5,089±31[4] K
Metallicity [Fe/H]+0.07±0.03[4] dex
Other designations
CPD−52°7028, HD 123569, HIP 69191, HR 5297, SAO 241496, WDS J14099-5326A[5]
Database references
SIMBADdata

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]

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]

  1. ^ a b c d e f g h i j k l m Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Alves2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggen1983 was invoked but never defined (see the help page).