HD 222109

Last updated
HD 222109
Observation data
Epoch J2000       Equinox J2000
Constellation Andromeda [1]
Right ascension 23h 37m 32.04280s [2]
Declination +44° 25′ 44.3723″ [2]
Apparent magnitude  (V)5.80 [3] (6.08 + 7.38) [4]
Characteristics
Spectral type B8V [5]
U−B color index -0.32 [3]
B−V color index -0.06 [3]
Astrometry
Radial velocity (Rv)−22.90±3.9 [6] km/s
Proper motion (μ)RA: 14.20±0.30 [2] mas/yr
Dec.: −17.63±0.45 [2] mas/yr
Parallax (π)4.04±0.52  mas [2]
Distance approx. 800  ly
(approx. 250  pc)
Absolute magnitude  (MV)−1.12 [1]
Orbit [7]
Period (P)351.22 yr
Semi-major axis (a)0.41″
Eccentricity (e)0.39
Inclination (i)40.3°
Longitude of the node (Ω)157.1°
Periastron epoch (T) B 2103.29
Argument of periastron (ω)
(secondary)		0.0°
Details
Mass 2.9 [8]   M☉
Surface gravity (log g)3.932±0.021 [9]   cgs
Temperature 12,157±100 [9]   K
Rotational velocity (v sin i)158±13 [9]  km/s
Age 54 [8]   Myr
Other designations
BD+43°4508, HD 222109, HIP 116582, HR 8962, SAO 53202
Database references
SIMBAD data

HD 222109 is a binary star system located in the northern constellation of Andromeda. It has a combined apparent visual magnitude of 5.80, [3] which allows it to be visible to the naked eye as a single star. The system has a combined spectral classification of B8V. [5] It is situated at a distance of approximately 800 light years from the Solar System, [2] and the two stars orbit each other with a period of 351.22 years. They are separated by a distance of 0.41″ and have an orbital eccentricity of 0.39. [4] Individually, the stars have apparent magnitudes of 6.08 and 7.38, respectively. [4]

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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 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, S2CID   18759600
  3. 1 2 3 4 Guetter, H. H.; Hewitt, A. V. (June 1984), "Photoelectric UBV photometry for 317 PZT and VZT stars", Publications of the Astronomical Society of the Pacific, 96: 441–443, Bibcode:1984PASP...96..441G, doi: 10.1086/131362
  4. 1 2 3 Malkov, O. Yu.; et al. (2012), "Dynamical Masses of a Selected Sample of Orbital Binaries", Astronomy & Astrophysics, 546: 5, Bibcode:2012A&A...546A..69M, doi: 10.1051/0004-6361/201219774 , A69
  5. 1 2 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. ↑ 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. S2CID   119231169.
  7. ↑ "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 14 March 2017.
  8. 1 2 Gullikson, Kevin; Kraus, Adam; Dodson-Robinson, Sarah (2016). "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars". The Astronomical Journal. 152 (2): 40. arXiv: 1604.06456 . Bibcode:2016AJ....152...40G. doi: 10.3847/0004-6256/152/2/40 . S2CID   119179065.
  9. 1 2 3 Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv: 1008.1761 , Bibcode:2010ApJ...722..605H, doi:10.1088/0004-637X/722/1/605, S2CID   118532653


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