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HD 120565

From Wikipedia, the free encyclopedia
Spectroscopic binary in the constellation Camelopardalis
HD 120565
Location of HD 120565 on the map (circled)
Observation data
EpochJ2000.0      EquinoxJ2000.0 (ICRS)
ConstellationCamelopardalis[1]
Right ascension13h 42m 23.18342s[2]
Declination+82° 45′ 08.7103″[2]
Apparent magnitude (V)5.91±0.01[3]
Characteristics
Evolutionary stagered giant branch[2]
Spectral typeG9 III[4]
B−Vcolor index+1.01[5]
Astrometry
Radial velocity (Rv)−45.2±1.2[6] km/s
Proper motion (μ)RA: +29.995mas/yr[2]
Dec.: −43.734mas/yr[2]
Parallax (π)8.8109±0.0364 mas[2]
Distance370 ± 2 ly
(113.5 ± 0.5 pc)
Absolute magnitude (MV)+0.48[1]
Details
Mass2.70±0.11[2] M
Radius10.8+0.3
−0.2
[7] R
Luminosity64.1±0.5[2] L
Surface gravity (log g)2.47[8] cgs
Temperature4,993±122[9] K
Metallicity[Fe/H]−0.20[10] dex
Rotational velocity (v sin i)2.6±1[11] km/s
Age503+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
SIMBADdata

HD 120565, also designated asHR 5203, is astar located in the northerncircumpolar constellationCamelopardalis. It is faintly visible to thenaked eye as an orange-hued point of light with anapparent magnitude of 5.91.Gaia DR3parallax 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 anevolvedG-typegiant 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 of4,993 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 of2.6 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]

References

[edit]
  1. ^abcAnderson, 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.
  2. ^abcdefghijkVallenari, 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.
  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. ^abCowley, 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. ^abBrown, 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.
  8. ^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.
  9. ^abStassun, 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.
  10. ^abCharbonnel, 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.
  11. ^abcDe 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. RetrievedAugust 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.
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