HD 191104

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HD 191104
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila
Right ascension 20h 07m 50.36773s[1]
Declination +09° 23′ 59.4022″[1]
Apparent magnitude (V) 6.443[2]
Characteristics
Spectral type F3V[3]
U−B color index -0.033[2]
B−V color index +0.472[2]
Astrometry
Radial velocity (Rv) −27[4] km/s
Proper motion (μ) RA: +46.75[1] mas/yr
Dec.: +28.81[1] mas/yr
Parallax (π) 25.40 ± 1.00[1] mas
Distance 128 ± 5 ly
(39 ± 2 pc)
Other designations
BD+08° 4344, HD 191104, HIP 99158, HR 7693, SAO 125478.
Database references
SIMBAD data

HD 191104 is a triple star system in the equatorial constellation of Aquila. Two of the components form a close spectroscopic binary system, while a third stars orbits the pair at a greater distance.[5]

References[edit]

  1. ^ a b c d e 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 
  2. ^ a b c Rakos, K. D.; et al. (February 1982), "Photometric and astrometric observations of close visual binaries", Astronomy and Astrophysics Supplement Series 47: 221–235, Bibcode:1982A&AS...47..221R 
  3. ^ Abt, H. A. (March 1981), "Visual multiples. VII - MK classifications", Astrophysical Journal Supplement Series 45: 437−456, Bibcode:1981ApJS...45..437A, doi:10.1086/190719 
  4. ^ Wilson, R. E. (1953), General Catalogue of Stellar Radial Velocities, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W 
  5. ^ Tokovinin, Andrei (April 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, 87 

External links[edit]