HD 224635 and HD 224636

HD 224635/HD 224636
Observation data
Epoch J2000      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 mas[7]
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
BD+32 4747, HIP 118281, SAO 73656, ADS 17149, WDS J23595+3343
HD 224635: HR 9074
HD 224636: HR 9075
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]

  1. ^ a b 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.
  2. ^ a b c d e Cite error: The named reference aa546_A69_5 was invoked but never defined (see the help page).
  3. ^ a b 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.
  4. ^ a b c d Cite error: The named reference Struve1955 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Fabricius2002 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference rv was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Tokovinin was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference PASTEL was invoked but never defined (see the help page).