HD 120565

HD 120565

Location of HD 120565 on the map (circled)
Observation data Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation	Camelopardalis [1]
Right ascension	13h 42m 23.18342s [2]
Declination	+82° 45′ 08.7103″ [2]
Apparent magnitude  (V)	5.91±0.01 [3]
Characteristics
Evolutionary stage	red giant branch [2]
Spectral type	G9 III [4]
B−V color index	+1.01 [5]
Astrometry
Radial velocity (Rv)	−45.2±1.2 [6] km/s
Proper motion (μ)	RA: +29.995 mas/yr [2] Dec.: −43.734 mas/yr [2]
Parallax (π)	8.8109±0.0364  mas [2]
Distance	370 ± 2  ly (113.5 ± 0.5  pc)
Absolute magnitude  (MV)	+0.48 [1]
Details
Mass	2.70±0.11 [2]   M☉
Radius	10.8+0.3 −0.2 [7]   R☉
Luminosity	64.1±0.5 [2]   L☉
Surface gravity (log g)	2.47 [8]   cgs
Temperature	4,993±122 [9]   K
Metallicity [Fe/H]	−0.20 [10]   dex
Rotational velocity (v sin i)	2.6±1 [11]  km/s
Age	503+75 −70 [2]   Myr
Other designations
AG+83°357, BD+83°397, FK5 1643, GC 18611, HD 120565, HIP 66878, HR 5203, SAO 2266 [12]
Database references
SIMBAD	data

HD 120565, also designated as HR 5203, is a star located in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye as an orange-hued point of light with an apparent magnitude of 5.91. Gaia DR3 parallax measurements imply a distance of 370 light-years and it is currently drifting closer with a heliocentric radial velocity of −45.2  km/s . At its current distance, HD 120565's brightness is diminished by 0.12 magnitudes due to interstellar extinction ^[13] and it has an absolute magnitude of +0.48. ^[1]

HD 120565 has a stellar classification of G9 III, ^[4] indicating that it is an evolved G-type giant star. It has 2.7 times the mass of the Sun ^[2] but at the age of 503 million years, ^[2] it has expanded to 10.8 times the radius of the Sun. ^[7] It radiates 64.1 times the luminosity of the Sun ^[2] from its enlarged photosphere at an effective temperature of 4,993  K . ^[9] HD 120565 is metal deficient with an iron abundance 63.1% that of the Sun's or [Fe/H] = −0.22, ^[10] and it spins modestly with a projected rotational velocity of 2.6  km/s . ^[11] It was determined to be a single-lined spectroscopic binary by J.R. De Mederios and J. R. P. da Silva based on radial velocity variations. ^[11]

References

1. 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.
2. 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.
3. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 –L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361. S2CID   17128864.
4. Cowley, A. P.; Bidelman, W. P. (February 1979). "MK spectral types for some F and G stars". Publications of the Astronomical Society of the Pacific. 91: 83. Bibcode:1979PASP...91...83C. doi: 10.1086/130446 . eISSN   1538-3873. ISSN   0004-6280.
5. Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode:1970Priv.........0H. S2CID   231475662.
6. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
7. 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.
8. Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302 . Bibcode:2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765 . eISSN   1432-0746. ISSN   0004-6361. S2CID   131780028.
9. Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . eISSN   1538-3881. hdl: 1721.1/124721 . S2CID   166227927.
10. Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics. 633: A34. arXiv: 1910.12732 . Bibcode:2020A&A...633A..34C. doi: 10.1051/0004-6361/201936360 . eISSN   1432-0746. ISSN   0004-6361. S2CID   204907220.
11. De Medeiros, J. R.; Da Silva, J. R. P.; Maia, M. R. G. (20 October 2002). "The Rotation of Binary Systems with Evolved Components". The Astrophysical Journal. 578 (2): 943–950. arXiv: astro-ph/0207288 . Bibcode:2002ApJ...578..943D. doi: 10.1086/342613 . eISSN   1538-4357. ISSN   0004-637X. S2CID   16196039.
12. "HD 120565". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved August 22, 2023.
13. Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711. S2CID   118879856.