HD 222399

HD 222399 is a double star in the northern constellation of Andromeda. The magnitude 6.57[2] primary is an F-type subgiant star with a stellar classification of F2IV.[3] It has a magnitude 10.57 companion at an angular separation of 14.7″ along a position angle of 162° (as of 2002).[7]

HD 222399
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension  23h 40m 02.8166s[1]
Declination +37° 39′ 09.5064″[1]
Apparent magnitude (V) 6.57[2]
Characteristics
Spectral type F2IV[3]
U−B color index +0.10[2]
B−V color index +0.35[2]
Astrometry
Radial velocity (Rv)−21.0±0.6[4] km/s
Proper motion (μ) RA: −8.490±0.042[1] mas/yr
Dec.: −81.051±0.037[1] mas/yr
Parallax (π)10.7133 ± 0.0351[1] mas
Distance304.4 ± 1.0 ly
(93.3 ± 0.3 pc)
Details
Mass1.77[5] M☉
Surface gravity (log g)3.78[5] cgs
Metallicity [Fe/H]−0.04[5] dex
Rotational velocity (v sin i)55[6] km/s
Age1.4[5] Gyr
Other designations
BD+36° 5098, HD 222399, HIP 116781, HR 8973, SAO 73422.
Database references
SIMBADdata
Database references
SIMBADdata

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Danziger, I. J.; Dickens, R. J. (July 1967), "Spectrophotometry of New Short-Period Variable Stars", Astrophysical Journal, 149: 55, Bibcode:1967ApJ...149...55D, doi:10.1086/149231
  3. Cowley, Anne; Fraquelli, Dorothy (February 1974), "MK Spectral Types for Some Bright F Stars", Publications of the Astronomical Society of the Pacific, 86 (509): 70, Bibcode:1974PASP...86...70C, doi:10.1086/129562.
  4. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. Casagrande, L.; et al. (2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey". Astronomy & Astrophysics. 530 (A138): 21. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276.
  6. Royer, F.; Zorec, J.; Gómez, A. E. (February 2007), "Rotational velocities of A-type stars. III. Velocity distributions", Astronomy and Astrophysics, 463 (2): 671–682, arXiv:astro-ph/0610785, Bibcode:2007A&A...463..671R, doi:10.1051/0004-6361:20065224
  7. Mason, B. D.; et al. (2014), The Washington Visual Double Star Catalog, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22
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