HD 191104

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 mas[1]
Distance128 ± 5 ly
(39 ± 2 pc)
Other designations
BD+08° 4344, HD 191104, HIP 99158, HR 7693, SAO 125478.
Database references
SIMBADdata

HD 191104 is a star system in the equatorial constellation of Aquila. Two of the components form a close spectroscopic binary system, while a third star, also thought to be a spectroscopic binary,[5] orbits the pair at a greater distance.[6]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Rakos1982 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Abt1981 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcrv1953 was invoked but never defined (see the help page).
  5. ^ Tokovinin, A. A. (1997). "MSC - a catalogue of physical multiple stars". Astronomy and Astrophysics Supplement Series. 124: 75–84. Bibcode:1997A&AS..124...75T. doi:10.1051/aas:1997181.
  6. ^ Cite error: The named reference aj147_4_87 was invoked but never defined (see the help page).