HD 191104

Last updated
HD 191104
Observation data
Epoch J2000       Equinox J2000
Constellation Aquila [1]
Right ascension 20h 07m 50.36773s [2]
Declination +09° 23′ 59.4022″ [2]
Apparent magnitude  (V)6.443 [3]
Characteristics
Spectral type F3V [4]
U−B color index −0.033 [3]
B−V color index +0.472 [3]
Astrometry
Radial velocity (Rv)−27 [5] km/s
Proper motion (μ)RA: +46.75 [2] mas/yr
Dec.: +28.81 [2] mas/yr
Parallax (π)25.40±1.00  mas [2]
Distance 128 ± 5  ly
(39 ± 2  pc)
Absolute magnitude  (MV)+3.46 [1]
Orbit
PrimaryA
CompanionB
Period (P)604.7 [6] yr
Semi-major axis (a)3.4 [7] ″
Orbit [6]
PrimaryBa
CompanionBb
Period (P)23.8 days
Eccentricity (e)0.123
Semi-amplitude (K1)
(primary)		16.2 km/s
Semi-amplitude (K2)
(secondary)		16.6 km/s
Details
A
Mass 1.2 [6]   M☉
Radius 1.4 [8]   R☉
Luminosity 2.9 [8]   L☉
Temperature 6,615 [8]   K
Rotation 9.34 [9] days
Age 722 [8]   Myr
Ba
Mass 0.74 [6]   M☉
Bb
Mass 0.72 [6]   M☉
Other designations
BD+08°4344, HD 191104, HIP 99158, HR 7693, SAO 125478
Database references
SIMBAD data
A
B

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, [6] orbits the pair at a greater distance. [10]

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
  2. 1 2 3 4 5 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
  3. 1 2 3 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
  4. ↑ 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
  5. ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W
  6. 1 2 3 4 5 6 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 .
  7. ↑ Tokovinin, A. A. (1998), "New spectroscopic components in six multiple systems", Astronomy Letters, 24 (3): 288, Bibcode:1998AstL...24..288T
  8. 1 2 3 4 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  9. ↑ Oelkers, Ryan J.; Rodriguez, Joseph E.; Stassun, Keivan G.; Pepper, Joshua; Somers, Garrett; Kafka, Stella; Stevens, Daniel J.; Beatty, Thomas G.; Siverd, Robert J.; Lund, Michael B.; Kuhn, Rudolf B.; James, David; Gaudi, B. Scott (2018), "Variability Properties of Four Million Sources in the TESS Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey", The Astronomical Journal, 155 (1): 39, arXiv: 1711.03608 , Bibcode:2018AJ....155...39O, doi: 10.3847/1538-3881/aa9bf4
  10. ↑ 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, S2CID   56066740, 87
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