HD 5789/5788

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HD 5789/5788
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
HD 5789
Right ascension 01h 00m 03.56s
Declination +44° 42′ 47.7″
Apparent magnitude (V) 6.06
HD 5788
Right ascension 01h 00m 03.37s
Declination +44° 42′ 40.1″
Apparent magnitude (V) 5.69
Characteristics
HD 5789
Spectral type B9.5Vn[1]
B−V color index -0.03
HD 5788
Spectral type A2Vn[2]
U−B color index -0.06
B−V color index -0.01
Astrometry
Radial velocity (Rv) 4.40[1] km/s
Proper motion (μ) RA: 13.85[1] mas/yr
Dec.: -23.83[1] mas/yr
Parallax (π) 8.40 ± 0.76[1] mas
Distance 390 ± 40 ly
(120 ± 10 pc)
Radial velocity (Rv) 17[2] km/s
Proper motion (μ) RA: 10[2] mas/yr
Dec.: -26[2] mas/yr
Other designations
HIP 4675, BD+43° 193
HD 5789: HR 283, SAO 36833.
HD 5788: HR 282, SAO 36832.
Database references
HD 5789
SIMBAD data
HD 5788
SIMBAD data

HD 5789 and HD 5788 is a pair of stars comprising a binary star[3] system in the constellation Andromeda. Located approximately 119 parsecs (390 ly) away, the primary is a hot, massive blue star with an apparent magnitude of 6.06,[1] while the secondary is slightly smaller and cooler but brighter, with an apparent magnitude of 5.69.[2] Both stars are main-sequence stars, meaning that they are currently fusing hydrogen into helium in their cores.[1][2]

References[edit]

  1. ^ a b c d e f g "HD 5789". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-02-25. 
  2. ^ a b c d e f "HD 5788". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-02-25. 
  3. ^ Eggleton, P. P.; Tokovinin, A. A. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.  edit