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] |
| 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 |
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]
References
[edit]- ^ a b c d e f g h i j k l m Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- ^ a b c d Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society, 448 (3): 2749–2765, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189, S2CID 119217930.
- ^ "HD 123569". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-01.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976
- ^ Eggen, O. J. (February 1983), "NGC 2423 and the red giants of the Hyades supercluster", Astronomical Journal, 88: 190-196, Bibcode:1983AJ.....88..190E, doi:10.1086/113305.
