Astronomy:HD 193664

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Short description: Star in the constellation Draco
HD 193664
Location of HD 193664 (circled in red)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Draco[1]
Right ascension  20h 17m 31.328s[2]
Declination +66° 51′ 13.28″[2]
Apparent magnitude (V) 5.93[3]
Characteristics
Evolutionary stage main sequence[2]
Spectral type G3 V[4]
U−B color index +0.06[3]
B−V color index +0.58[3]
Astrometry
Radial velocity (Rv)−4.7[5] km/s
Proper motion (μ) RA: +468.684[2] mas/yr
Dec.: +297.589[2] mas/yr
Parallax (π)57.2041 ± 0.0208[2] mas
Distance57.02 ± 0.02 ly
(17.481 ± 0.006 pc)
Absolute magnitude (MV)4.69[1]
Details
Mass1.04[6] M☉
Radius1.03[7] R☉
Luminosity1.1[6] L☉
Surface gravity (log g)4.45[6] cgs
Temperature5,922[6] K
Metallicity [Fe/H]−0.13[5] dex
Rotational velocity (v sin i)1.3[8] km/s
Age3.18[6] Gyr
Other designations
BD+66°1281, GJ 788, HD 193664, HIP 100017, HR 7783, SAO 18796[9]
Database references
SIMBADdata

HD 193664 is a star in the northern constellation of Draco. HD 193664 is its Henry Draper Catalogue designation. With an apparent magnitude of 5.93,[3] according to the Bortle Scale it is visible to the naked eye from suburban skies. Parallax measurements yield an estimated distance of 57 light years.[2] It has a relatively large proper motion of 0.558 arc seconds per year across the sky,[10] and is drifting closer to the Sun with a radial velocity of −4.7 km/s.[5]

This star is considered a solar analog—meaning that it is photometrically analogous to the Sun—and it displays no significant variability.[11] It is a G-type main sequence star with a stellar classification of G3V.[4] Both the mass and radius of HD 193664 differ from those of the Sun by just a few percent, although it has a somewhat lower metallicity.[5] It may be around the same age as the Sun, being an estimated 3.2 billion years old.[6] The effective temperature of the stellar atmosphere is 5,922 K,[6] giving it the yellow-hued glow of a G-type star.[12]

HD 193664 has been examined for signs of an infrared excess that could indicate the presence of a circumstellar disk of dust, but none has been found (as of 2012).[13] This is member of the thin disk population of stars that lie near the galactic plane.[5]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 Karatas, Y.; Schuster, W. J. (October 2006), "Metallicity and absolute magnitude calibrations for UBV photometry", Monthly Notices of the Royal Astronomical Society 371 (4): 1793–1812, doi:10.1111/j.1365-2966.2006.10800.x, Bibcode: 2006MNRAS.371.1793K. 
  4. ↑ 4.0 4.1 Shenavrin, V. I. et al. (2011), "Search for and study of hot circumstellar dust envelopes", Astronomy Reports 55 (1): 31–81, doi:10.1134/S1063772911010070, Bibcode: 2011ARep...55...31S. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Ramírez, I. et al. (February 2013), "Oxygen abundances in nearby FGK stars and the galactic chemical evolution of the local disk and halo", The Astrophysical Journal 764 (1): 78, doi:10.1088/0004-637X/764/1/78, Bibcode: 2013ApJ...764...78R. 
  6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 6.6 Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal 153 (1): 19, doi:10.3847/1538-3881/153/1/21, 21, Bibcode: 2017AJ....153...21L. 
  7. ↑ Takeda, Genya et al. (February 2007), "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog", The Astrophysical Journal Supplement Series 168 (2): 297–318, doi:10.1086/509763, Bibcode: 2007ApJS..168..297T. 
  8. ↑ Valenti, Jeff A.; Fischer, Debra A. (July 2005), "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs", The Astrophysical Journal Supplement Series 159 (1): 141–166, doi:10.1086/430500, Bibcode: 2005ApJS..159..141V. 
  9. ↑ "HD 193664". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+193664. 
  10. ↑ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal 129 (3): 1483–1522, doi:10.1086/427854, Bibcode: 2005AJ....129.1483L. 
  11. ↑ Metlov, V. G. (January 2003), "Photoelectric Observations of Bright Solar Type Stars", Astronomical and Astrophysical Transactions 22 (1): 47–50, doi:10.1080/1055679021000020020, Bibcode: 2003A&AT...22...47M. 
  12. ↑ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html, retrieved 2012-01-16. 
  13. ↑ Maldonado, J. et al. (May 2012), "Metallicity of solar-type stars with debris discs and planets⋆", Astronomy & Astrophysics 541: 10, doi:10.1051/0004-6361/201218800, A40, Bibcode: 2012A&A...541A..40M. 



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