64 Aquarii

64 Aquarii is a star located 312 light years away from the Sun in the zodiac constellation of Aquarius. 64 Aquarii is its Flamsteed designation. With an apparent visual magnitude of 6.93,[2] it is too faint to be readily visible to the naked eye. The star is moving further from the Earth with a heliocentric radial velocity of +11 km/s.[4]

64 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension  22h 39m 16.03872s[1]
Declination −10° 01′ 40.1750″[1]
Apparent magnitude (V) 6.93[2]
Characteristics
Spectral type G2/3 IV/V[3]
B−V color index 0.619±0.009[2]
Astrometry
Radial velocity (Rv)+10.7±0.5[4] km/s
Proper motion (μ) RA: −60.940[1] mas/yr
Dec.: +3.803[1] mas/yr
Parallax (π)10.4508 ± 0.1554[1] mas
Distance312 ± 5 ly
(96 ± 1 pc)
Absolute magnitude (MV)2.75[2]
Details[5]
Mass1.45±0.06 M☉
Radius2.78±0.07 R☉
Luminosity13.133±0.225[1] L☉
Surface gravity (log g)3.708±0.013 cgs
Temperature5,926±97 K
Metallicity [Fe/H]−0.02±0.11 dex
Rotational velocity (v sin i)8.75 km/s
Age2.63±0.26 Gyr
Other designations
BD−10° 5963, GC 31614, HD 214572, HIP 111843, SAO 165217[6]
Database references
SIMBADdata

The stellar classification for this star is G2/3 IV/V,[3] which indicates the spectrum displays mixed traits of a G-type main-sequence star and a more evolved subgiant star. It is 2.6 billion years old and is spinning with a projected rotational velocity of 8.75 km/s. The star has 1.45 times the mass of the Sun and 2.8 times the Sun's radius.[5] It is radiating 13[1] times the luminosity of the Sun from its photosphere at an effective temperature of 5,926 K.[5]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  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.
  3. Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
  4. 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.
  5. Lund, Mikkel N.; et al. (December 2016), "Asteroseismic Properties of Solar-type Stars Observed with the NASA K2 Mission: Results from Campaigns 1-3 and Prospects for Future Observations", Publications of the Astronomical Society of the Pacific, 128 (970): 124204, arXiv:1608.07292, Bibcode:2016PASP..128l4204L, doi:10.1088/1538-3873/128/970/124204.
  6. "64 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 24, 2018.
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