60 Andromedae

60 Andromedae
Diagram showing star positions and boundaries of the Andromeda constellation and its surroundings
Location of 60 Andromedae (circled)
Observation data
Epoch J2000      Equinox J2000
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)3.0±2.6″
Eccentricity (e)0.34±0.03
Inclination (i)127±15°
Longitude of the node (Ω)6±17°
Periastron epoch (T)37886±11 HJD
Argument of periastron (ω)
(secondary)		358±6°
Details
60 And A
Mass2.0+0.7
−0.3[5] M☉
Surface gravity (log g)1.70±0.44[6] cgs
Temperature4054±42[6] K
Metallicity [Fe/H]−0.13±0.12[6] dex
60 And B
Mass0.5±0.1[5] M☉
Other designations
b Andromedae,[7] BD+43 447, HD 13520, HIP 10340, HR 643, IRAS 02100+4359, SAO 37867.
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 then 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 2 3 4 5 6 van Leeuwen, F. (November 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. 1 2 3 4 Argue, A. N. (1966), "UBV photometry of 550 F, G and K type stars", Monthly Notices of the Royal Astronomical Society, 133: 475–493, Bibcode:1966MNRAS.133..475A, doi:10.1093/mnras/133.4.475.
  3. 1 2 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
  4. ↑ Wilson, Ralph Elmer (1953), General Catalogue of Stellar Radial Velocities, Washington: Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  5. 1 2 3 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: 1163–1177, arXiv:astro-ph/0211483, Bibcode:2003A&A...398.1163P, doi:10.1051/0004-6361:20021736.
  6. 1 2 3 Koleva, M.; Vazdekis, A. (February 2012), "Stellar population models in the UV. I. Characterisation of the New Generation Stellar Library", Astronomy & Astrophysics, 538: A143, arXiv:1111.5449, Bibcode:2012A&A...538A.143K, doi:10.1051/0004-6361/201118065.
  7. ↑ 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.
  1. "* 60 And". SIMBAD. Centre de données astronomiques de Strasbourg.
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