Spectroscopic binary in the constellation Camelopardalis
HD 120565 , also designated asHR 5203 , is astar located in the northerncircumpolar constellation Camelopardalis . It is faintly visible to thenaked eye as an orange-hued point of light with anapparent magnitude of 5.91.Gaia DR3 parallax measurements imply a distance of 370light-years and it is currently drifting closer with a heliocentricradial velocity of −45.2 km/s . At its current distance, HD 120565's brightness is diminished by 0.12magnitudes due tointerstellar extinction [ 13] and it has anabsolute magnitude of +0.48.[ 1]
HD 120565 has astellar classification of G9 III,[ 4] indicating that it is anevolved G-type giant star . It has 2.7 times themass of the Sun [ 2] but at the age of 503million years ,[ 2] it has expanded to 10.8 times theradius of the Sun .[ 7] It radiates 64.1 times theluminosity of the Sun [ 2] from its enlargedphotosphere at aneffective temperature of 4,993 K .[ 9] HD 120565 is metal deficient with aniron abundance 63.1% that of theSun 's or [Fe/H] = −0.22,[ 10] and it spins modestly with aprojected rotational velocity of 2.6 km/s .[ 11] It was determined to be a single-linedspectroscopic binary by J.R. De Mederios and J. R. P. da Silva based on radial velocity variations.[ 11]
^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 . XHIP record for this object atVizieR .^a b c d e f g h i j k 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 atVizieR .^ 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 . ^a b 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 . ^ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)".Private Communication .Bibcode :1970Priv.........0H .S2CID 231475662 . ^ 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 . ^a b 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 atVizieR .^ Anders, F.; et al. (August 2019)."Photo-astrometric distances, extinctions, and astrophysical parameters forGaia DR2 stars brighter thanG = 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 . ^a b Stassun, Keivan G.; et al. (9 September 2019)."The RevisedTESS 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 . ^a b 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 theGaia 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 . ^a b c 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 . ^ "HD 120565" .SIMBAD .Centre de données astronomiques de Strasbourg . RetrievedAugust 22, 2023 .^ 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 .