Star in the constellation of Dorado
Lambda Doradus (Lambda Dor),Latinized fromλ Doradus , is a solitary[ 14] yellow huedstar located in the southernconstellation Dorado . It has anapparent magnitude of 5.13,[ 2] making it faintly visible to thenaked eye if viewed under ideal conditions.Parallax measurements place the star at a distance of 551light years ,[ 1] and it is currently receding with a heliocentricradial velocity of 10 km/s .[ 7]
Lambda Dor has astellar classification of either G6[ 4] or G8 III,[ 5] depending on the source. Nevertheless, both indicate that it is ared giant , and it is currently on thered giant branch fusing hydrogen in a shell outside a helium core.[ 3] At present it has 3.82 times themass of the Sun [ 9] and at an age of 258million years , it has expanded to aradius of 21.2 R ☉ .[ 9] It radiates at over 250 times theluminosity of the Sun from itsphotosphere at aneffective temperature of 5,009 K .[ 9] Lambda Dor is slightly metal deficient, with aniron abundance 12% below solar levels.[ 9] It currently spins with aprojected rotational velocity of 5.2 km/s .[ 10]
^a b c d e 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 .^a b 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 . ^a b Setiawan, J.; Pasquini, L.; da Silva, L.; von der Lühe, O.; Hatzes, A. (January 2003)."Precise radial velocity measurements of G and K giants" .Astronomy & Astrophysics .397 (3):1151– 1159.Bibcode :2003A&A...397.1151S .doi :10.1051/0004-6361:20021559 .eISSN 1432-0746 .ISSN 0004-6361 . ^a b Houk, N.; Cowley, A. P. (1975).University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53° .Bibcode :1975mcts.book.....H . ^a b Keenan, Philip C.; McNeil, Raymond C. (October 1989)."The Perkins catalog of revised MK types for the cooler stars" .The Astrophysical Journal Supplement Series .71 : 245.Bibcode :1989ApJS...71..245K .doi :10.1086/191373 .eISSN 1538-4365 .ISSN 0067-0049 . ^ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars".Communications of the Lunar and Planetary Laboratory .4 :99– 110.Bibcode :1966CoLPL...4...99J . ^a b Jofré, E.; Petrucci, R.; Saffe, C.; Saker, L.; Artur de la Villarmois, E.; Chavero, C.; Gómez, M.; Mauas, P. J. D. (26 January 2015)."Stellar parameters and chemical abundances of 223 evolved stars with and without planets" .Astronomy & Astrophysics .574 : A50.arXiv :1410.6422 .Bibcode :2015A&A...574A..50J .doi :10.1051/0004-6361/201424474 .eISSN 1432-0746 .ISSN 0004-6361 . ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation".Astronomy Letters .38 (5):331– 346.arXiv :1108.4971 .Bibcode :2012AstL...38..331A .doi :10.1134/S1063773712050015 .eISSN 1562-6873 .ISSN 1063-7737 .S2CID 119257644 . ^a b c d e Ottoni, G.; Udry, S.; Ségransan, D.; Buldgen, G.; Lovis, C.; Eggenberger, P.; Pezzotti, C.; Adibekyan, V.; Marmier, M.; Mayor, M.; Santos, N. C.; Sousa, S. G.; Lagarde, N.; Charbonnel, C. (January 2022)."CORALIE radial-velocity search for companions around evolved stars (CASCADES): I. Sample definition and first results: Three new planets orbiting giant stars" .Astronomy & Astrophysics .657 : A87.arXiv :2201.01528 .Bibcode :2022A&A...657A..87O .doi :10.1051/0004-6361/202040078 .eISSN 1432-0746 .ISSN 0004-6361 . ^a b De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014)."A catalog of rotational and radial velocities for evolved stars" .Astronomy & Astrophysics .561 : A126.arXiv :1312.3474 .Bibcode :2014A&A...561A.126D .doi :10.1051/0004-6361/201220762 .eISSN 1432-0746 .ISSN 0004-6361 . ^ Gomes da Silva, J.; Santos, N. C.; Adibekyan, V.; Sousa, S. G.; Campante, T. L.; Figueira, P.; Bossini, D.; Delgado-Mena, E.; Monteiro, M. J. P. F. G.; de Laverny, P.; Recio-Blanco, A.; Lovis, C. (February 2021)."Stellar chromospheric activity of 1674 FGK stars from the AMBRE-HARPS sample" .Astronomy & Astrophysics .646 : A77.arXiv :2012.10199 .Bibcode :2021A&A...646A..77G .doi :10.1051/0004-6361/202039765 .eISSN 1432-0746 .ISSN 0004-6361 . ^ 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 . ^ "lam Dor" .SIMBAD .Centre de données astronomiques de Strasbourg . RetrievedAugust 21, 2022 .^ 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 .