HD 193664
Star in the constellation Draco
HD 193664 a star in the northern constellation of Draco . HD 193664 is its Henry Draper Catalogue designation. With an apparent magnitude of 5.93,[2] 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 .[1] It has a relatively large proper motion of 0.558 arc seconds per year across the sky,[9] and is drifting closer to the Sun with a radial velocity of −4.7 km/s.[4]
This star is considered a solar analog —meaning that it is photometrically analogous to the Sun—and it displays no significant variability .[10] It is a G-type main sequence star with a stellar classification of G3V.[3] 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 .[4] It may be around the same age as the Sun, being an estimated 3.2 billion years old.[5] The effective temperature of the stellar atmosphere is 5,922 K,[5] giving it the yellow-hued glow of a G-type star.[11]
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).[12] This is member of the thin disk population of stars that lie near the galactic plane .[4]
References
^ a b c d e Brown, A. G. A. ; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties" . Astronomy & Astrophysics . 649 : A1. arXiv :2012.01533 . Bibcode :2021A&A...649A...1G . doi :10.1051/0004-6361/202039657 . S2CID 227254300 . (Erratum: doi :10.1051/0004-6361/202039657e ) . Gaia EDR3 record for this source at VizieR .
^ a b c d e 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, Bibcode :2006MNRAS.371.1793K , doi :10.1111/j.1365-2966.2006.10800.x .
^ a b Shenavrin, V. I.; et al. (2011), "Search for and study of hot circumstellar dust envelopes", Astronomy Reports , 55 (1): 31–81, Bibcode :2011ARep...55...31S , doi :10.1134/S1063772911010070 , S2CID 122700080 .
^ a b c d e 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, arXiv :1301.1582 , Bibcode :2013ApJ...764...78R , doi :10.1088/0004-637X/764/1/78 , S2CID 118751608 .
^ a b c d e f g Luck, R. Earle (January 2017), "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants", The Astronomical Journal , 153 (1): 19, arXiv :1611.02897 , Bibcode :2017AJ....153...21L , doi :10.3847/1538-3881/153/1/21 , S2CID 119511744 , 21.
^ 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, arXiv :astro-ph/0607235 , Bibcode :2007ApJS..168..297T , doi :10.1086/509763 , S2CID 18775378 .
^ 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, Bibcode :2005ApJS..159..141V , doi :10.1086/430500 .
^ "HD 193664" . SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2015-11-13 .
^ 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, arXiv :astro-ph/0412070 , Bibcode :2005AJ....129.1483L , doi :10.1086/427854 , S2CID 2603568 .
^ Metlov, V. G. (January 2003), "Photoelectric Observations of Bright Solar Type Stars", Astronomical and Astrophysical Transactions , 22 (1): 47–50, Bibcode :2003A&AT...22...47M , doi :10.1080/1055679021000020020 .
^ "The Colour of Stars" , Australia Telescope, Outreach and Education , Commonwealth Scientific and Industrial Research Organisation , December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-01-16 .
^ Maldonado, J.; et al. (May 2012), "Metallicity of solar-type stars with debris discs and planets⋆", Astronomy & Astrophysics , 541 : 10, arXiv :1202.5884 , Bibcode :2012A&A...541A..40M , doi :10.1051/0004-6361/201218800 , S2CID 46328823 , A40.