Astronomy:60 Aquarii

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Short description: Star in the constellation of Aquarius
60 Aquarii
Observation data
Equinox J2000.0]] (ICRS)
Constellation Aquarius
Right ascension  22h 34m 02.91361s[1]
Declination −01° 34′ 27.3638″[1]
Apparent magnitude (V) 5.89[2]
Characteristics
Evolutionary stage horizontal branch[3]
Spectral type G6 III[4]
U−B color index +0.73[2]
B−V color index +1.00[2]
Astrometry
Radial velocity (Rv)−8[5] km/s
Proper motion (μ) RA: +40.30[6] mas/yr
Dec.: –35.92[6] mas/yr
Parallax (π)8.6909 ± 0.1113[1] mas
Distance375 ± 5 ly
(115 ± 1 pc)
Absolute magnitude (MV)+0.14[4]
Details
Mass2.77[4] M☉
Radius11.13+0.26
−0.16[1] R☉
Luminosity64.7±1.0[1] L☉
Surface gravity (log g)2.88[7] cgs
Temperature4,820[7] K
Metallicity [Fe/H]−0.24[7] dex
Age437[4] Myr
Other designations
60 Aqr, BD−02°5781, HD 213789, HIP 111394, HR 8590, SAO 146160, WDS J22340-0134[8]
Database references
SIMBADdata

60 Aquarii is a star located 375 light years away from the Sun in the equatorial constellation of Aquarius. 60 Aquarii is its Flamsteed designation. It is visible to the naked eye as a dim, yellow-hued star with an apparent visual magnitude of 5.89.[2] The star is moving closer to the Earth with a heliocentric radial velocity of –8 km/s.[5]

This is an aging giant star with a stellar classification of G6 III,[4] most likely on the horizontal branch.[3] It is 437[4] million years old with 2.77[4] times the mass of the Sun. Having exhausted the hydrogen at its core, this star has evolved away from the main sequence and expanded to 11[1] times the Sun's radius. It is radiating 65[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,820 K.[7]

A magnitude 11.54 companion star is located at an angular separation of 100.90″ along a position angle of 299°, as of 2013.[9]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 Johnson, H. L. et al. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory 4 (99): 99. Bibcode: 1966CoLPL...4...99J. 
  3. ↑ 3.0 3.1 Stock, Stephan et al. (August 2018), "Precise radial velocities of giant stars. X. Bayesian stellar parameters and evolutionary stages for 372 giant stars from the Lick planet search", Astronomy & Astrophysics 616: 15, doi:10.1051/0004-6361/201833111, A33, Bibcode: 2018A&A...616A..33S. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 Takeda, Yoichi et al. (August 2008), "Stellar Parameters and Elemental Abundances of Late-G Giants", Publications of the Astronomical Society of Japan 60 (4): 781–802, doi:10.1093/pasj/60.4.781, Bibcode: 2008PASJ...60..781T. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ 6.0 6.1 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 
  7. ↑ 7.0 7.1 7.2 7.3 McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants", Astrophysical Journal Supplement Series 74: 1075–1128, doi:10.1086/191527, Bibcode: 1990ApJS...74.1075M. 
  8. ↑ "60 Aqr -- Star in double system", SIMBAD (Centre de Données astronomiques de Strasbourg), http://simbad.u-strasbg.fr/simbad/sim-id?Ident=60+Aquarii, retrieved 2012-07-13. 
  9. ↑ Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M 



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