Astronomy:60 Andromedae

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Short description: Star system in the constellation Andromeda
60 Andromedae
Andromeda constellation map.svg
Red circle.svg
Location of 60 Andromedae (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda
Right ascension  02h 13m 13.32387s[1]
Declination +44° 13′ 53.9546″[1]
Apparent magnitude (V) +4.82[2]
Characteristics
Spectral type K3.5 III Ba0.4[3]
U−B color index +1.74[2]
B−V color index +1.48[2]
Astrometry
Radial velocity (Rv)–46.3[4] km/s
Proper motion (μ) RA: –20.90[1] mas/yr
Dec.: –14.46[1] mas/yr
Parallax (π)6.15 ± 0.63[1] mas
Distanceapprox. 530 ly
(approx. 160 pc)
Orbit[5]
Period (P)748.2±0.4 days
Semi-major axis (a)2.4±0.6 mas
Eccentricity (e)0.80
Inclination (i)54.1±19.9°
Longitude of the node (Ω)344.5±10.3°
Periastron epoch (T)37886±11 HJD
Argument of periastron (ω)
(secondary)		358±6°
Semi-amplitude (K1)
(primary)		4.88 km/s
Details
60 And A
Mass2.0+0.7
−0.3[6] M☉
Surface gravity (log g)1.70±0.44[7] cgs
Temperature4054±42[7] K
Metallicity [Fe/H]−0.13±0.12[7] dex
60 And B
Mass0.5±0.1[6] M☉
Other designations
b Andromedae,[8] BD+43 447, HD 13520, HIP 10340, HR 643, IRAS 02100+4359, SAO 37867, PPM 44882
Database references
SIMBADdata

60 Andromedae (abbreviated 60 And) is a star system in the northern constellation of Andromeda, located to the west-northwest of Gamma Andromedae. 60 Andromedae is the Flamsteed designation though the star also bears the Bayer designation b Andromedae. It is bright enough to be seen by the naked eye with an apparent visual magnitude of 4.82.[2] Based upon parallax measurements made during the Hipparcos mission, it is at a distance of roughly 530 light-years (160 parsecs) from Earth.[1]

This system is known to have three components. The primary is a giant star with a stellar classification of K3.5 III Ba0.4, meaning that an overabundance of barium ionized one time is observed in the spectrum of the star, making it a barium star. The secondary component is likely a white dwarf with a period of 748.2 days and an eccentricity of 0.34. There is a third component at an angular separation of 0.22 arcseconds.[3]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics 474 (2): 653–664, doi:10.1051/0004-6361:20078357, Bibcode: 2007A&A...474..653V. 
  2. ↑ 2.0 2.1 2.2 2.3 Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society 133 (4): 475–493, doi:10.1093/mnras/133.4.475, Bibcode: 1966MNRAS.133..475A. 
  3. ↑ 3.0 3.1 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  4. ↑ Wilson, Ralph Elmer (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (Washington: Carnegie Institution of Washington), Bibcode: 1953GCRV..C......0W. 
  5. ↑ Ren, Shulin; Fu, Yanning (March 2013), "Hipparcos Photocentric Orbits of 72 Single-lined Spectroscopic Binaries", The Astronomical Journal 145 (3): 7, doi:10.1088/0004-6256/145/3/81, 81, Bibcode: 2013AJ....145...81R. 
  6. ↑ 6.0 6.1 Pourbaix, D.; Boffin, H. M. J. (February 2003), "Reprocessing the Hipparcos Intermediate Astrometric Data of spectroscopic binaries. II. Systems with a giant component", Astronomy and Astrophysics 398 (3): 1163–1177, doi:10.1051/0004-6361:20021736, Bibcode: 2003A&A...398.1163P. 
  7. ↑ 7.0 7.1 7.2 Koleva, M.; Vazdekis, A. (February 2012), "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library", Astronomy & Astrophysics 538: A143, doi:10.1051/0004-6361/201118065, Bibcode: 2012A&A...538A.143K. 
  8. ↑ Tirion; Rappaport; Lovi (1987). Willmann-Bell, Inc.. ed. Uranometria 2000.0 - Volume II - The Southern Hemisphere to +6°. Richmond, Virginia, USA. ISBN 0-943396-15-8. 

External links

  1. "* 60 And". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+60+And. 



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