HD 222399

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HD 222399
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 23h 40m 02.81727s[1]
Declination +37° 39′ 09.5055″[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: −7.88±0.41[1] mas/yr
Dec.: −81.27±0.33[1] mas/yr
Parallax (π) 11.01 ± 0.41[1] mas
Distance 300 ± 10 ly
(91 ± 3 pc)
Details
Mass 1.77[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
Age 1.4[5] Gyr
Other designations
BD+36° 5098, HD 222399, HIP 116781, HR 8973, SAO 73422.
Database references
SIMBAD data
Database references
SIMBAD data

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]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (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 d 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. ^ a b 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. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  5. ^ a b c d 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. 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, retrieved 2015-07-22 

External links[edit]