39 Aquarii

Last updated
39 Aquarii
Observation data
Epoch J2000       Equinox J2000
Constellation Aquarius
Right ascension 22h 12m 25.76398s [1]
Declination −14° 11′ 38.3009″ [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 [6] mas/yr
Dec.: -47.43 [6] mas/yr
Parallax (π)22.5378±0.1723  mas [1]
Distance 145 ± 1  ly
(44.4 ± 0.3  pc)
Absolute magnitude  (MV)2.92 [7]
Details
Mass 1.35 [8]   M☉
Radius 1.79+0.04
−0.10 [1]   R☉
Luminosity 6.109±0.054 [1]   L☉
Surface gravity (log g)3.99 [3]   cgs
Temperature 6,806 [3]   K
Metallicity [Fe/H]–0.21 [3]   dex
Age 1.8 [7]   Gyr
Other designations
39 Aqr, BD−14°6229, HD 210705, HIP 109624, HR 8462, SAO 164923 [4]
Database references
SIMBAD data

39 Aquarii is a star in the zodiac 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, [6] this star is at a distance of around 137 light-years (42 parsecs ) from Earth. 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°. [9]

The stellar classification of this star is F0 V; [3] hence it belongs to the category of F-type main sequence stars that generate energy through hydrogen fusion at the core. It is 1.8 [7]  billion years old with 1.35 [8] times the mass of the Sun and 1.79 [1] times the Sun's radius. The star is radiating 6.1 [1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,806 K. [3]

References

  1. 1 2 3 4 5 6 7 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. 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.
  3. 1 2 3 4 5 6 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 , S2CID   119428437.
  4. 1 2 "* 39 Aqr". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2012-07-16.
  5. ↑ Wilson, Ralph Elmer (1953), "General catalogue of stellar radial velocities", Carnegie Institute Washington D.C. Publication, Carnegie Institution of Washington, Bibcode:1953GCRV..C......0W.
  6. 1 2 3 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, S2CID   18759600.
  7. 1 2 3 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 (3): 989–1019, arXiv: astro-ph/0405198 , Bibcode:2004A&A...418..989N, doi:10.1051/0004-6361:20035959, S2CID   11027621.
  8. 1 2 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154 , Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID   33401607.
  9. ↑ 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.
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