Astronomy:HD 36584

From HandWiki
Short description: Visual binary in Dorado


HD 36584
Location of HD 36584 on the map (circled)
Observation data
{{#ifeq:J2000.0 (ICRS)|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| [[History:Epoch|Epoch J2000.0 (ICRS)]]      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000.0 (ICRS)}}
Constellation Dorado[1]
A
Right ascension  05h 26m 59.80322s[2]
Declination −68° 37′ 21.1327″[2]
Apparent magnitude (V) 6.62±0.01[3]
B
Right ascension  05h 26m 59.87970s[4]
Declination −68° 37′ 22.4439″[4]
Apparent magnitude (V) 6.91±0.01[3]
Characteristics
Spectral type F0 IV/V[5]
A
Evolutionary stage main sequence[2]
B−V color index +0.37[6]
B
Evolutionary stage main sequence[7]
B−V color index +0.40[6]
Astrometry
Radial velocity (Rv)−4.60±3.4[8] km/s
Absolute magnitude (MV)+1.57[1]
A
Proper motion (μ) RA: −10.638[2] mas/yr
Dec.: −17.846[2] mas/yr
Parallax (π)12.4037 ± 0.0261[2] mas
Distance263.0 ± 0.6 ly
(80.6 ± 0.2 pc)
B
Proper motion (μ) RA: −4.710 mas/yr
Dec.: −19.675 mas/yr
Parallax (π)12.4171 ± 0.0384[4] mas
Distance262.7 ± 0.8 ly
(80.5 ± 0.2 pc)
Orbit[9]
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[10] M☉
Radius2.4[7] R☉
Luminosity11.2[7] L☉
Surface gravity (log g)3.67[2] cgs
Temperature6,800[7] K
B
Mass1.57[10] M☉
Radius2.2[7] R☉
Luminosity8.3[7] L☉
Temperature6,604[7] K
Other designations
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,[3] 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[2][4] and it is drifting closer with a heliocentric radial velocity of −4.6 km/s.[8] The system has a combined absolute magnitude of 1.57.[1]

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.[9]

The system has a combined stellar classification of F0 IV/V,[5] 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.[10]

References

  1. ↑ 1.0 1.1 1.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 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. doi:10.1051/0004-6361:20011822. ISSN 0004-6361. Bibcode: 2002A&A...384..180F. 
  4. ↑ 4.0 4.1 4.2 4.3 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  5. ↑ 5.0 5.1 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars: Declinations −90° to −53°. 1. Bibcode: 1975mcts.book.....H. 
  6. ↑ 6.0 6.1 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. ISSN 0004-6361. Bibcode: 2000A&A...356..141F. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Hardegree-Ullman, Kevin K.; Apai, Dániel; Bergsten, Galen J.; Pascucci, Ilaria; López-Morales, Mercedes (2023). "Bioverse: A Comprehensive Assessment of the Capabilities of Extremely Large Telescopes to Probe Earth-like O2 Levels in Nearby Transiting Habitable-zone Exoplanets". The Astronomical Journal 165 (6): 267. doi:10.3847/1538-3881/acd1ec. Bibcode: 2023AJ....165..267H. 
  8. ↑ 8.0 8.1 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. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  9. ↑ 9.0 9.1 Zirm, H. (June 2013). "Information Circular No. 180". International Astronomical Union Commission 26. ISSN 1024-7769. http://astro.gsu.edu/wds/bsl/cir180.pdf. 
  10. ↑ 10.0 10.1 10.2 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. doi:10.1093/mnras/stac2827. ISSN 0035-8711. Bibcode: 2022MNRAS.517.2925C. 
  11. ↑ "HD 36584". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+36584. 
  12. ↑ Gill, David; Astronomer, H. M. (June 1898). "Fifth list of new double stars". Astronomische Nachrichten 146 (21): 369–372. doi:10.1002/asna.18981462104. ISSN 0004-6337. Bibcode: 1898AN....146..369G. 
  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. doi:10.1086/323920. ISSN 0004-6256. Bibcode: 2001AJ....122.3466M. 
Cite error: <ref> tag with name "Gould1879" defined in <references> is not used in prior text.



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:HD_36584&oldid=4558917"