Astronomy:HD 224635 and HD 224636

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Short description: Binary star system in the constellation Andromeda
HD 224635/HD 224636
Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0      Equinox J2000.0 (ICRS)| Epoch J2000      [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}}
Constellation Andromeda
HD 224635
Right ascension  23h 59m 29.2915s[1]
Declination +33° 43′ 25.8773″[1]
Apparent magnitude (V) 6.46[2]
HD 224636
Right ascension  23h 59m 29.2054s[3]
Declination +33° 43′ 27.6539″[3]
Apparent magnitude (V) 6.72[2]
Characteristics
HD 224635
Spectral type F8[4]
B−V color index 0.51[5]
HD 224636
Spectral type G1[4]
B−V color index 0.55[5]
Astrometry
Radial velocity (Rv)−7.90±0.2[6] km/s
Proper motion (μ) RA: −59.68±0.65[7] mas/yr
Dec.: −113.19±0.35[7] mas/yr
Parallax (π)34.57 ± 0.51[7] mas
Distance94 ± 1 ly
(28.9 ± 0.4 pc)
Details
Mass1.19 + 1.13 [8] M☉
Luminosity3.47[9] L☉
Temperature6,072[10] K
Metallicity-0.070[10]
Other designations
HD 224635: {{{names1}}}
HD 224636: {{{names2}}}
Database references
SIMBADdata
Database references
SIMBADdata

HD 224635 and HD 224636 is a pair of stars comprising a binary star system in the constellation Andromeda. They are located approximately 94 light years away[7] and they orbit each other every 717 years.[2]

The primary star is HD 224635, a magnitude 6.46[2] star (making it visible by the naked eye under very favourable conditions) with a spectral type F8[4] that is 1.19 times more massive than the Sun.[8]

The secondary star is the slightly fainter HD 224636, with an apparent visual magnitude of 6.72,[2] a spectral type G1,[4] and 1.13 times more massive than the Sun.[8]

References

  1. ↑ 1.0 1.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Malkov, O. Yu. et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics 546: 5, doi:10.1051/0004-6361/201219774, A69, Bibcode: 2012A&A...546A..69M 
  3. ↑ 3.0 3.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  4. ↑ 4.0 4.1 4.2 4.3 Struve, Otto; Franklin, K. L. (1955). "Spectrographic Observations of Visual Double Stars". The Astrophysical Journal 121: 337. doi:10.1086/145993. Bibcode: 1955ApJ...121..337S. 
  5. ↑ 5.0 5.1 Fabricius, C.; Høg, E.; Makarov, V. V.; Mason, B. D.; Wycoff, G. L.; Urban, S. E. (2002). "The Tycho double star catalogue". Astronomy and Astrophysics 384: 180–189. doi:10.1051/0004-6361:20011822. Bibcode: 2002A&A...384..180F. 
  6. ↑ de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics 546: 14, doi:10.1051/0004-6361/201219219, A61, Bibcode: 2012A&A...546A..61D. 
  7. ↑ 7.0 7.1 7.2 7.3 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  8. ↑ 8.0 8.1 8.2 Tokovinin, Andrei (2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal 147 (4): 14. doi:10.1088/0004-6256/147/4/87. 87. Bibcode: 2014AJ....147...87T. 
  9. ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A. 
  10. ↑ 10.0 10.1 Soubiran, Caroline et al. (2016), "The PASTEL catalogue: 2016 version", Astronomy & Astrophysics 591: A118, doi:10.1051/0004-6361/201628497, Bibcode: 2016A&A...591A.118S. 




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