Visual binary in Dorado.
HD 36584Location of HD 36584 on the map (circled)
Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS ) Constellation Dorado A Right ascension 05h 26m 59.80322s [ 1] Declination −68° 37′ 21.1327″[ 1] Apparent magnitude (V)6.62± 0.01[ 2] B Right ascension 05h 26m 59.87970s [ 3] Declination −68° 37′ 22.4439″[ 3] Apparent magnitude (V)6.91± 0.01[ 2] Characteristics Spectral type F0 IV/V[ 4] A B−Vcolor index +0.37[ 5] B B−Vcolor index +0.40[ 5] Astrometry Radial velocity (Rv )−4.60± 3.4[ 6] km/s Absolute magnitude (MV )+1.57[ 7] A Proper motion (μ)RA: −10.638mas /yr [ 1] Dec.: −17.846mas /yr [ 1] Parallax (π)12.4037± 0.0261 mas [ 1] Distance 263.0 ± 0.6 ly pc ) B Proper motion (μ)RA: −4.710 mas /yr [ 3] Dec.: −19.675 mas /yr [ 3] Parallax (π)12.4171 ± 0.0384 mas [ 3] Distance 262.7 ± 0.8 ly pc ) Orbit [ 8] Period (P)795yr Semi-major axis (a)1.704″ Eccentricity (e)0.887 Inclination (i)129.5° Longitude of the node (Ω)74.8° Periastron epoch (T)JD Argument of periastron (ω)112.8° Details A Mass 1.69[ 9] M ☉ B Mass 1.57[ 9] M ☉ Other designations 24 G. Doradus [ 10] CD −68°308CPD −68°375GC 6795HD 36584HIP 25482HR 1859SAO 249281CCDM J05270-6837ABWDS J05270-6837AB[ 11] Database references SIMBAD the system A B
HD 36584 (HR 1859; 24 G. Doradus ) is avisual binary located in the southernconstellation Dorado . The primary has anapparent magnitude of 6.62 and the secondary has an apparent magnitude of 6.91,[ 2] telescope but not to thenaked eye . The system is located relatively close at a distance of 263light-years based onGaia DR3 parallax measurements[ 1] [ 3] radial velocity ofkm/s [ 6] absolute magnitude of 1.57.[ 7]
HD 36584 was first discovered to be a double star in 1898 byastronomer R.T.A Innes. At the time of discovery, the components had a separation of only half anarcsecond and the secondary was located at aposition angle of 210°.[ 12] telescope , but the individual characteristics of both stars cannot be studied. As of 2015, the secondary is located at a distance of 1.4" along a position angle of 159°.[ 13] years to circle each other in a veryeccentric orbit .[ 8]
The system has a combinedstellar classification of F0 IV/V,[ 4] evolved F-type star that has the blendedluminosity class of asubgiant andmain sequence star . The components have masses 1.69 and 1.57 times that of theSun respectively.[ 9]
^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 c Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (March 2002)."The Tycho double star catalogue" .Astronomy & Astrophysics .384 (1):180– 189.Bibcode :2002A&A...384..180F .doi :10.1051/0004-6361:20011822 eISSN 1432-0746 .ISSN 0004-6361 . ^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 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 . ^a b Fabricius, C.; Makarov, V. V. (April 2000). "Two-colour photometry for 9473 components of close Hipparcos double and multiple stars".Astronomy and Astrophysics .356 :141– 145.Bibcode :2000A&A...356..141F .eISSN 1432-0746 .ISSN 0004-6361 . ^a b 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 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 Zirm, H. (June 2013)."Information Circular No. 180" (PDF) .International Astronomical Union Commission 26 .ISSN 1024-7769 . ^a b c Chulkov, Dmitry; Malkov, Oleg (October 20, 2022)."Visual binary stars with known orbits in Gaia EDR3" .Monthly Notices of the Royal Astronomical Society .517 (2):2925– 2941.arXiv :2206.00604 Bibcode :2022MNRAS.517.2925C .doi :10.1093/mnras/stac2827 ISSN 0035-8711 .S2CID 249240123 . ^ 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 . ^ "HD 36584" .SIMBAD Centre de données astronomiques de Strasbourg . RetrievedFebruary 26, 2024 .^ Gill, David; Astronomer, H. M. (June 1898). "Fifth list of new double stars".Astronomische Nachrichten .146 (21):369– 372.Bibcode :1898AN....146..369G .doi :10.1002/asna.18981462104 .ISSN 0004-6337 . ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001)."The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog" .The Astronomical Journal .122 (6):3466– 3471.Bibcode :2001AJ....122.3466M .doi :10.1086/323920 ISSN 0004-6256 .S2CID 119533755 .
