Suspected variable in the constellation Dorado
κ Doradus Location of κ Doradus on the map (circled)
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS ) Constellation Dorado Right ascension 04h 44m 21.17834s [ 1] Declination −59° 43′ 57.8563″[ 1] Apparent magnitude (V)5.28[ 2] [ 3] Characteristics Spectral type A8 IV[ 4] B−Vcolor index +0.20[ 5] Variable type suspectedδ Scuti [ 3] Astrometry Radial velocity (Rv )0.00± 3.70[ 6] km/s Proper motion (μ)RA: +23.860mas /yr [ 1] Dec.: +39.974mas /yr [ 1] Parallax (π)14.8207± 0.0795 mas [ 1] Distance 220 ± 1 ly pc ) Absolute magnitude (MV )+1.15[ 7] Details Mass 1.78+0.36 −0.20 [ 8] M ☉ Radius 2.88+0.21 −0.19 [ 9] R ☉ Luminosity 26.6[ 10] L ☉ Surface gravity (log g )3.79± 0.08[ 9] cgs Temperature 7,623± 123[ 11] K Metallicity −0.18[ 12] dex Rotational velocity (v sin i )230[ 13] Other designations κ Dor ,12 G. Doradus [ 14] NSV 16162CPD −59°376FK5 2354GC 5810HD 30478HIP 22040HR 1530SAO 233664TIC 220414802[ 15] Database references SIMBAD data
Kappa Doradus ,Latinized fromκ Doradus , is a solitarystar [ 16] constellation Dorado . It is faintly visible to thenaked eye as a white-hued point of light with anapparent magnitude of 5.28.[ 2] light-years based onGaia DR3 parallax measurements[ 1] Solar System is not changing, having a somewhat constrained heliocentricradial velocity ofkm/s [ 6] magnitude due tointerstellar extinction [ 17] absolute magnitude of +1.15.[ 7]
The object has been given many different classes. Houk & Cowley (1975) gave a class of A8/9 III/IV,[ 18] evolved A-type star with the characteristics of an A8 and A9 star and the blendedluminosity class of agiant star and asubgiant . It has also been given a class of A8 IV and A5 III,[ 4] [ 19] mass of the Sun [ 8] radius of the Sun .[ 9] equatorial bulge 26% greater than its polar radius.[ 20] luminosity of the Sun [ 10] photosphere at aneffective temperature ofK [ 11] iron abundance 66.1% of theSun 's or [Fe/H] = −0.18.[ 12] projected rotational velocity ofkm/s [ 13] [ 20]
Kappa Doradus variability was first observed in 1981 by astronomer H. M. Matizen.[ 21] Alpha Doradus . Matizen found out that Kappa Doradus showDelta Scuti -like amplitudes of 0.03 magnitudes in thevisual passband within hours.[ 3] [ 22]
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(21 November 2012)."Fundamental parameters and infrared excesses ofHipparcos stars: Parameters and IR excesses fromHipparcos " .Monthly Notices of the Royal Astronomical Society .427 (1):343– 357.arXiv :1208.2037 Bibcode :2012MNRAS.427..343M .doi :10.1111/j.1365-2966.2012.21873.x eISSN 1365-2966 .ISSN 0035-8711 .S2CID 118665352 . ^a b Paunzen, E.; Schnell, A.; Maitzen, H. M. (October 2006)."An empirical temperature calibration for the Δa photometric system II: The A-type and mid F-type stars" .Astronomy & Astrophysics .458 (1):293– 296.arXiv :astro-ph/0607567 Bibcode :2006A&A...458..293P .doi :10.1051/0004-6361:20064889 eISSN 1432-0746 .ISSN 0004-6361 .S2CID 18219735 . ^a b 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 Huang, Su-Shu (September 1953)."A Statistical Study of the Rotation of the Stars" .The Astrophysical Journal .118 : 285.Bibcode :1953ApJ...118..285H .doi :10.1086/145751 eISSN 1538-4357 .ISSN 0004-637X .S2CID 120328179 . ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas".Resultados del Observatorio Nacional Argentino .1 .Bibcode :1879RNAO....1.....G . ^ "* kap Dor" .SIMBAD Centre de données astronomiques de Strasbourg . RetrievedSeptember 3, 2023 .^ Eggleton, P. P.; Tokovinin, A. A. (11 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 eISSN 1365-2966 .ISSN 0035-8711 .S2CID 14878976 . ^ 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 . ^ Houk, N.; Cowley, A. P. (1975).University of Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53° . Vol. 1.Bibcode :1975mcts.book.....H . ^ Abt, Helmut A.; Morrell, Nidia I. 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