17 Cygni

Star in the constellation Cygnus Cygnus constellation map.svg center 280 right Red circle.svg 10 17 Cygni 550 570 Location of 17 Cygni (circled in red) J2000 Cygnus A 19 46 25.600 +33 43 39.35 5.00 B 19 46 27.547 +33 43 48.89 8.55 F7 V + K6 V + K3 V + K3 V 0.46 A +4.1 +22.745 –448.311 47.6516 0.0675 +3.34 B +3.7 +21.547 –438.730 47.7379 0.0185 +6.91 A 1.24 1.538 4.262 0.027 6,455 3.66 9 2.8 B 0.78 0.70 4,652 0.21 4.62 y F 0.77 0.71 4,789 0.24 4.62 3.6 G 0.75 0.71 4,686 0.22 4.61 3.0 17 Cyg +33°3587 767.1 9670 187013 97295 7534 68827 17+Cyg 17+Cyg+B B HD+186858A F HD+186858B G 17 Cygni is the Flamsteed designation for a multiple star system in the northern constellation of Cygnus. It has an apparent visual magnitude of 5.00, so, according to the Bortle scale, it is visible from suburban skies at night. Measurements of the annual parallax find a shift of 0.0477″, which is equivalent to a distance of around 68.5 ly pc on from the Sun. It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.451 arcsecond/year. This system consists of two visual binary systems that were discovered by John Herschel in the 1820s. Components A and B form a bright, wide pair with an angular separation of 26.0 arcsecond and an estimated orbital period of ~6,200 years. The faint, close system consists of components F and G with a separation of 2.6 arcsecond and a period of 238 years. The two binaries form a hierarchical system with a separation of about 800 arcseconds and orbital period of 3.7 million years or more. Although the CCDM lists four other companions, these are not associated with the system. The stellar classification of the primary star, component A, is F7 V, which means it is a main sequence star like the Sun. The star has 1.24 times the mass of the Sun and 1.54 times the Sun's radius. It is some 2.8 billion years old and shines with 3.66 times the Sun's luminosity. The effective temperature of the stellar atmosphere is 6,455 K, giving it the yellow-white hued glow of an F-type star. References 2035035223783462400 2035035258143206016 2019AJ....158..138S The Revised TESS Input Catalog and Candidate Target List Stassun Keivan G. Oelkers Ryan J. Paegert Martin Torres Guillermo Pepper Joshua De Lee Nathan Collins Kevin Latham David W. Muirhead Philip S. Chittidi Jay Rojas-Ayala Bárbara Fleming Scott W. Rose Mark E. Tenenbaum Peter Ting Eric B. Kane Stephen R. Barclay Thomas Bean Jacob L. Brassuer C. E. Charbonneau David Ge Jian Lissauer Jack J. Mann Andrew W. McLean Brian Mullally Susan Narita Norio Plavchan Peter Ricker George R. Sasselov Dimitar Seager S. The Astronomical Journal 2019 158 4 138 10.3847/1538-3881/ab3467 free 1905.10694 1 Lasker Barry M. Lattanzi Mario G. McLean Brian J. Bucciarelli Beatrice Drimmel Ronald Garcia Jorge Greene Gretchen Guglielmetti Fabrizia Hanley Christopher Hawkins George Laidler Victoria G. Loomis Charles Meakes Michael Mignani Roberto Morbidelli Roberto Morrison Jane Pannunzio Renato Rosenberg Amy Sarasso Maria Smart Richard L. Spagna Alessandro Sturch Conrad R. Volpicelli Antonio White Richard L. Wolfe David Zacchei Andrea The Second-Generation Guide Star Catalog: Description and Properties The Astronomical Journal 2008 136 2 735 10.1088/0004-6256/136/2/735 0807.2522 2008AJ....136..735L 2016A&A...596A..76S Hα-activity and ages for stars in the SARG survey Sissa E. Gratton R. Desidera S. Martinez Fiorenzano A. F. Bonfanti A. Carolo E. Vassallo D. Claudi R. U. Endl M. Cosentino R. Astronomy and Astrophysics 2016 596 10.1051/0004-6361/201628531 free 1609.04660 . A dynamical study of the multiple system 17 Cygni ABFG Romanenko L. G. Astronomy Reports 61 3 206–220 March 2017 10.1134/S1063772917020056 2017ARep...61..206R 255199959 . Takeda Yoichi Fundamental Parameters and Elemental Abundances of 160 F-G-K Stars Based on OAO Spectrum Database Publications of the Astronomical Society of Japan 59 2 335–356 April 2007 2007PASJ...59..335T 10.1093/pasj/59.2.335 free . The Asteroseismic Target List for Solar-like Oscillators Observed in 2 minute Cadence with the Transiting Exoplanet Survey Satellite Schofield Mathew Chaplin William J. Huber Daniel Campante Tiago L. Davies Guy R. Miglio Andrea Ball Warrick H. Appourchaux Thierry Basu Sarbani Bedding Timothy R. Christensen-Dalsgaard Jørgen Creevey Orlagh García Rafael A. Handberg Rasmus Kawaler Steven D. Kjeldsen Hans Latham David W. Lund Mikkel N. Metcalfe Travis S. Ricker George R. Serenelli Aldo Silva Aguirre Victor Stello Dennis Vanderspek Roland The Astrophysical Journal Supplement Series 2019 241 1 12 1 10.3847/1538-4365/ab04f5 1901.10148 2019ApJS..241...12S 119481586 free 1 Nordström B. Mayor M. Andersen J. Holmberg J. Pont F. Jørgensen B. R. Olsen E. H. Udry S. Mowlavi N. 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 May 2004 10.1051/0004-6361:20035959 2004A&A...418..989N astro-ph/0405198 11027621 . 1 Takeda Yoichi Sato Bun'ei Kambe Eiji Masuda Seiji Izumiura Hideyuki Watanabe Etsuji Ohkubo Michiko Yanagisawa Kenshi Yasaka Yoshiro High-Dispersion Spectra Collection of Nearby F--K Stars at Okayama Astrophysical Observatory: A Basis for Spectroscopic Abundance Standards Publications of the Astronomical Society of Japan 57 1 13–25 February 2005 2005PASJ...57...13T . 10.1093/pasj/57.1.13 free Phillips N. M. Greaves J. S. Dent W. R. F. Matthews B. C. Holland W. S. Wyatt M. C. Sibthorpe B. 1 Target selection for the SUNS and DEBRIS surveys for debris discs in the solar neighbourhood Monthly Notices of the Royal Astronomical Society 403 3 1089–1101 April 2010 2010MNRAS.403.1089P 10.1111/j.1365-2966.2009.15641.x free 0911.3426 119262858 . See the note for F094. Holmberg J. Nordström B. Andersen J. 1 The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics Astronomy and Astrophysics 501 3 941–947 July 2009 10.1051/0004-6361/200811191 2009A&A...501..941H 0811.3982 118577511 . The Colour of Stars December 21, 2004 Australia Telescope, Outreach and Education Commonwealth Scientific and Industrial Research Organisation http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html 2012-01-16 . dead https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html March 18, 2012 * 17 Cyg 2013-10-26 Multiplicity among solar-type stars. IV. The CORAVEL radial velocities and the spectroscopic orbits of nearby K dwarfs Astronomy and Astrophysics Halbwachs J. -L Mayor M. Udry S. Fekel F. C. Hartkopf W. I. Levato H. Morrell N. I. Torres G. Udry S. 1 619 A81 2018 2018A&A...619A..81H 1808.04605 10.1051/0004-6361/201833377 119437322 . Lépine Sébastien Shara Michael M. A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) The Astronomical Journal 129 3 1483–1522 March 2005 10.1086/427854 2005AJ....129.1483L astro-ph/0412070 2603568 . 19 46 25.60 + 33 43 39.35 Category:M-type main-sequence stars Category:Binary stars Category:Cygnus (constellation) 7534 BD+33 3587 Cygni, 17 9670 097295 187013 Category:F7V stars Category:K6V stars Category:K3V stars