HD 36584

HD 36584
Location of HD 36584 on the map (circled)
Observation data
Epoch 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−V color index +0.37[5]
B
B−V color 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: −10.638 mas/yr[1]
Dec.: −17.846 mas/yr[1]
Parallax (π)12.4037 ± 0.0261 mas[1]
Distance263.0 ± 0.6 ly
(80.6 ± 0.2 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]
Distance262.7 ± 0.8 ly
(80.5 ± 0.2 pc)
Orbit[8]
Period (P)795 yr
Semi-major axis (a)1.704″
Eccentricity (e)0.887
Inclination (i)129.5°
Longitude of the node (Ω)74.8°
Periastron epoch (T)2,403,927.97472 JD
Argument of periastron (ω)
(secondary)		112.8°
Details
A
Mass1.69[9] M☉
B
Mass1.57[9] M☉
Other designations
24 G. Doradus[10], CD−68°308, CPD−68°375, GC 6795, HD 36584, HIP 25482, HR 1859, SAO 249281, CCDM J05270-6837AB, WDS J05270-6837AB[11]
Database references
SIMBADthe system
A
B

HD 36584 (HR 1859; 24 G. Doradus) is a visual binary located in the southern constellation Dorado. The primary has an apparent magnitude of 6.62 and the secondary has an apparent magnitude of 6.91,[2] making both stars visible in a telescope but not to the naked eye. The system is located relatively close at a distance of 263 light-years based on Gaia DR3 parallax measurements[1][3] and it is drifting closer with a heliocentric radial velocity of −4.6 km/s.[6] The system has a combined absolute magnitude of 1.57.[7]

HD 36584 was first discovered to be a double star in 1898 by astronomer R.T.A Innes. At the time of discovery, the components had a separation of only half an arcsecond and the secondary was located at a position angle of 210°.[12] The separation between the components increased to 1.34" and the position angle of the secondary shifted to 162° in 1997. At this separation, the components can be resolved in an amateur 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] The two stars take about 795 years to circle each other in a very eccentric orbit.[8]

The system has a combined stellar classification of F0 IV/V,[4] indicating that it is an evolved F-type star that has the blended luminosity class of a subgiant and main sequence star. The components have masses 1.69 and 1.57 times that of the Sun respectively.[9]

References

  1. ^ 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 at VizieR.
  2. ^ 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.
  3. ^ 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 at VizieR.
  4. ^ 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.
  5. ^ 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.
  6. ^ 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.
  7. ^ 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.
  8. ^ a b Zirm, H. (June 2013). "Information Circular No. 180" (PDF). International Astronomical Union Commission 26. ISSN 1024-7769.
  9. ^ 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.
  10. ^ 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.
  11. ^ "HD 36584". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved February 26, 2024.
  12. ^ 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.
  13. ^ 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.