| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 14h 09m 54.81424s[2] |
| Declination | −53° 26′ 20.2049″[2] |
| Apparent magnitude (V) | 4.74[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | G9-III[3] |
| B−V color index | +0.938±0.004[1] |
| Astrometry | |
| Radial velocity (Rv) | −17.12±0.12[2] km/s |
| Proper motion (μ) | RA: −145.136[2] mas/yr Dec.: −91.064[2] mas/yr |
| Parallax (π) | 18.2253±0.1091 mas[2] |
| Distance | 179 ± 1 ly (54.9 ± 0.3 pc) |
| Absolute magnitude (MV) | +1.00[1] |
| Details | |
| Mass | 2.50+0.11 −0.06[2] M☉ |
| Radius | 8.58+0.08 −0.17[2] R☉ |
| Luminosity | 40.1±0.5[2] 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 |
| Age | 621[2] Myr |
| Other designations | |
| CPD−52°7028, HD 123569, HIP 69191, HR 5297, SAO 241496, WDS J14099-5326A[5] | |
| 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.[1] It is located at a distance of approximately 179 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.[2] 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 8.6 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 41 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,089 K.[2]
References
[edit]- ^ a b c d e f 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. XHIP record for this object at VizieR.
- ^ a b c d e f g h i j k l m Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ 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.
