HD 191984

HD 191984
Observation data
Epoch J2000      Equinox J2000
Constellation Aquila[1]
A
Right ascension 20h 12m 35.12414s[2]
Declination +00° 52′ 01.3827″[2]
Apparent magnitude (V) 6.246[3]
B
Right ascension 20h 12m 35.04446s[4]
Declination +00° 51′ 58.9646″[4]
Apparent magnitude (V) 6.246[3]
Characteristics
Spectral type B9p CR(EU SR)[5] + A0[6]
U−B color index −0.033[3]
B−V color index +0.090[3]
Astrometry
A
Radial velocity (Rv)−19.0[7] km/s
Proper motion (μ) RA: +1.577[2] mas/yr
Dec.: −21.256[2] mas/yr
Parallax (π)6.4490±0.0534 mas[2]
Distance506 ± 4 ly
(155 ± 1 pc)
B
Radial velocity (Rv)−21.0[7] km/s
Proper motion (μ) RA: +4.733[4] mas/yr
Dec.: −17.988[4] mas/yr
Parallax (π)6.5263 ± 0.0318 mas[4]
Distance500 ± 2 ly
(153.2 ± 0.7 pc)
Details
A
Mass2.6[2] M☉
Radius2.5[2] R☉
Luminosity60[2] L☉
Surface gravity (log g)3.96[2] cgs
Temperature10,497[2] K
Metallicity [Fe/H]−1.00[2] dex
Rotational velocity (v sin i)150[8] km/s
Age262[2] Myr
B
Mass2.2[4] M☉
Radius2.3[4] R☉
Luminosity31[4] L☉
Surface gravity (log g)3.87[4] cgs
Temperature8,801[4] K
Metallicity [Fe/H]−1.42[4] dex
Age574[4] Myr
Other designations
BD+00°4444, HD 191984, HIP 99585, HR 7717.
Database references
SIMBADdata
A
B

HD 191984 is a double star in the equatorial constellation of Aquila. As of 2011, the components have an angular separation of 2.52″ along a position angle of 205.7°.[9]

References

  1. ↑ 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 6 7 8 9 10 11 12 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.
  3. 1 2 3 4 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. 1 2 3 4 5 6 7 8 9 10 11 12 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.
  5. ↑ Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
  6. ↑ Renson, P.; Manfroid, J. (May 2009), "Catalogue of Ap, HgMn and Am stars", Astronomy and Astrophysics, 498 (3): 961–966, Bibcode:2009A&A...498..961R, doi:10.1051/0004-6361/200810788
  7. 1 2 Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Washington, Carnegie Institute of Washington, D.C., Bibcode:1953GCRV..C......0W
  8. ↑ Abt, Helmut A.; Morrell, Nidia I. (July 1995), "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars", Astrophysical Journal Supplement, 99: 135, Bibcode:1995ApJS...99..135A, doi:10.1086/192182
  9. ↑ Mason, Brian D.; et al. (May 2012), "Speckle Interferometry at the U.S. Naval Observatory. XVIII" (PDF), The Astronomical Journal, 143 (5): 6, Bibcode:2012AJ....143..124M, doi:10.1088/0004-6256/143/5/124, 124, archived from the original on June 13, 2017


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