HD 214810

HD 214810 is a visual binary star in the equatorial constellation of Aquarius. The pair orbit each other with a period of about 54.2 years.[2]

HD 214810

Observation data Epoch J2000      Equinox J2000
Constellation	Aquarius
Right ascension	22^h 40^m 47.95600^s[1]
Declination	−03° 33′ 15.2789″[1]
Apparent magnitude (V)	6.32 (6.52 + 8.63)[2]
Characteristics
Spectral type	G9 V Fe-0.7[3]
U−B color index	−0.02[4]
B−V color index	+0.52[4]
Astrometry
Radial velocity (Rv)	13.73 km/s
Proper motion (μ)	RA: -7.52[1] mas/yr Dec.: -45.25[1] mas/yr
Parallax (π)	28.93 ± 0.77[1] mas
Distance	113 ± 3 ly (34.6 ± 0.9 pc)
Orbit[5]
Period (P)	54.57 ± 0.30 yr
Semi-major axis (a)	0.367 ± 0.003″
Eccentricity (e)	0.005 ± 0.003
Inclination (i)	87.5 ± 0.5°
Longitude of the node (Ω)	128.9 ± 0.5°
Periastron epoch (T)	B 1969.38 ± 1.5
Argument of periastron (ω) (secondary)	12.9 ± 20.0°
Details
HD 214810 A
Mass	1.26[6] M☉
Surface gravity (log g)	4.19[3] cgs
Temperature	6,151[3] K
Metallicity [Fe/H]	−0.22[3] dex
Age	3.7[7] Gyr
HD 214810 B
Mass	0.87[6] M☉
Other designations
BD-04° 5728, HD 214810, HIP 111965, HR 8629, SAO 146239.
Database references
SIMBAD	data

References

1. 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. Cvetkovic, Z.; Ninkovic, S. (2010), "On the Component Masses of Visual Binaries", Serbian Astronomical Journal, 180: 71–80, Bibcode:2010SerAJ.180...71C, doi:10.2298/SAJ1080071C
3. Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637
4. Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
5. "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Retrieved 21 May 2017.
6. 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, 87
7. Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191

External links

• Image HD 214810