39 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| Right ascension | 22h 12m 25.75608s[1] |
| Declination | −14° 11′ 38.2442″[1] |
| Apparent magnitude (V) | 6.03[2] |
| Characteristics | |
| Spectral type | F0 V[3] |
| U−B color index | +0.00[4] |
| B−V color index | +0.38[2] |
| Astrometry | |
| Radial velocity (Rv) | +15.2[5] km/s |
| Proper motion (μ) | RA: +23.89[1] mas/yr Dec.: -47.43[1] mas/yr |
| Parallax (π) | 23.78 ± 0.72[1] mas |
| Distance | 137 ± 4 ly (42 ± 1 pc) |
| Absolute magnitude (MV) | 2.92[6] |
| Details | |
| Surface gravity (log g) | 3.99[3] cgs |
| Temperature | 6,806[3] K |
| Metallicity [Fe/H] | –0.21[3] dex |
| Age | 1.8[6] Gyr |
| Other designations | |
39 Aquarii (abbreviated 39 Aqr) is a star in the constellation of Aquarius. 39 Aquarii is its Flamsteed designation. It is a faint naked eye star with an apparent visual magnitude of 6.03.[2] Based upon an annual parallax shift of 23.78 measured with a 3% margin of error,[1] this star is at a distance of around 137 light-years (42 parsecs) from Earth.
The stellar classification of this star is F0 V;[3] hence it belongs to the category of F-type main sequence stars. It is a double star with a magnitude 9.3 companion at an angular separation of 0.6 arcseconds along a position angle of 257°.[7]
References
- 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. - 1 2 3 Corben, P. M.; Stoy, R. H. (1968), "Photoelectric Magnitudes and Colours for Bright Southern Stars", Monthly Notes of the Astronomical Society of Southern Africa, 27: 11, Bibcode:1968MNSSA..27...11C.
- 1 2 3 4 5 Cenarro, A. J.; et al. (January 2007), "Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters", Monthly Notices of the Royal Astronomical Society, 374 (2): 664–690, arXiv:astro-ph/0611618, Bibcode:2007MNRAS.374..664C, doi:10.1111/j.1365-2966.2006.11196.x.
- 1 2 "39 Aqr -- Variable Star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-07-16.
- ↑ Wilson, Ralph Elmer (1953), General catalogue of stellar radial velocities, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
- 1 2 Nordström, B.; et al. (May 2004), "The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs", Astronomy and Astrophysics, 418: 989–1019, arXiv:astro-ph/0405198, Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959.
- ↑ Fabricius, C.; Makarov, V. V. (April 2000), "Two-colour photometry for 9473 components of close Hipparcos double and multiple stars", Astronomy and Astrophysics, 356: 141–145, Bibcode:2000A&A...356..141F.
External links
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