HD 224635 and HD 224636

Last updated
HD 224635/HD 224636
Observation data
Epoch J2000       Equinox J2000
Constellation Andromeda [1]
HD 224635
Right ascension 23h 59m 29.2915s [2]
Declination +33° 43′ 25.8773″ [2]
Apparent magnitude  (V)6.46 [3]
HD 224636
Right ascension 23h 59m 29.2054s [4]
Declination +33° 43′ 27.6539″ [4]
Apparent magnitude  (V)6.72 [3]
Characteristics
HD 224635
Evolutionary stage main sequence [2]
Spectral type F8 [5]
B−V color index 0.51 [6]
HD 224636
Evolutionary stage main sequence [4]
Spectral type G1 [5]
B−V color index 0.55 [6]
Astrometry
Radial velocity (Rv)−7.90±0.2 [7] km/s
Proper motion (μ)RA: −59.68±0.65 [8] mas/yr
Dec.: −113.19±0.35 [8] mas/yr
Parallax (π)34.57±0.51  mas [8]
Distance 94 ± 1  ly
(28.9 ± 0.4  pc)
Absolute magnitude  (MV)+3.5 [1]
Details
HD 224635
Mass 1.19 [9]   M☉
Radius 1.20 [10]   R☉
Luminosity 1.90 [10]   L☉
Surface gravity (log g)4.36 [10]   cgs
Temperature 6,191 [10]   K
Metallicity −0.070 [11]
Age 1.42 [12]   Gyr
HD 224636
Mass 1.13 [9]   M☉
Radius 1.15 [10]   R☉
Luminosity1.58 [10]   L☉
Surface gravity (log g)4.36 [10]   cgs
Temperature 6,023 [10]   K
Metallicity −0.070 [11]
Age 1.46 [12]   Gyr
Other designations
BD+32 4747, HIP 118281, SAO 73656, ADS 17149, WDS J23595+3343
HD 224635: HR 9074
HD 224636: HR 9075
Database references
SIMBAD HD 224635
HD 224636

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 [8] and they orbit each other every 717 years. [3]

The primary star is HD 224635, a magnitude 6.46 [3] star (making it visible by the naked eye under very favourable conditions) with a spectral type F8 [5] that is 1.19 times more massive than the Sun. [9]

The secondary star is the slightly fainter HD 224636, with an apparent visual magnitude of 6.72, [3] a spectral type G1, [5] and 1.13 times more massive than the Sun. [9]

References

  1. 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  3. 1 2 3 4 5 Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi: 10.1051/0004-6361/201219774 , A69
  4. 1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  5. 1 2 3 4 Struve, Otto; Franklin, K. L. (1955). "Spectrographic Observations of Visual Double Stars". The Astrophysical Journal. 121: 337. Bibcode:1955ApJ...121..337S. doi:10.1086/145993.
  6. 1 2 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. Bibcode:2002A&A...384..180F. doi: 10.1051/0004-6361:20011822 .
  7. ↑ 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, arXiv: 1208.3048 , Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID   59451347, A61.
  8. 1 2 3 4 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752 , Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID   18759600.
  9. 1 2 3 4 Tokovinin, Andrei (2014). "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs". The Astronomical Journal. 147 (4): 14. arXiv: 1401.6827 . Bibcode:2014AJ....147...87T. doi:10.1088/0004-6256/147/4/87. S2CID   56066740. 87.
  10. 1 2 3 4 5 6 7 8 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 .
  11. 1 2 Soubiran, Caroline; et al. (2016), "The PASTEL catalogue: 2016 version", Astronomy & Astrophysics, 591: A118, arXiv: 1605.07384 , Bibcode:2016A&A...591A.118S, doi:10.1051/0004-6361/201628497, S2CID   119258214.
  12. 1 2 Luck, R. Earle (2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal. 153 (1): 21. arXiv: 1611.02897 . Bibcode:2017AJ....153...21L. doi: 10.3847/1538-3881/153/1/21 .


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