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]
| 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 |
| Distance | 312 ± 5 ly (96 ± 1 pc) |
| Absolute magnitude (MV) | 2.75[2] |
| Details[5] | |
| Mass | 1.45±0.06 M☉ |
| Radius | 2.78±0.07 R☉ |
| Luminosity | 13.133±0.225[1] L☉ |
| Surface gravity (log g) | 3.708±0.013 cgs |
| Temperature | 5,926±97 K |
| Metallicity [Fe/H] | −0.02±0.11 dex |
| Rotational velocity (v sin i) | 8.75 km/s |
| Age | 2.63±0.26 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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
- 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.
- 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.
- Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
- 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.
- 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.
- "64 Aqr". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 24, 2018.
