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- 61_Cygni abstract "61 Cygni /ˈsɪɡnɪ/ is a binary star system in the constellation Cygnus, consisting of a pair of K-type dwarf stars that orbit each other in a period of about 659 years. Of apparent magnitude 5.20 and 6.05 respectively, they can be seen with binoculars in city skies or with the naked eye in rural areas without light pollution.61 Cygni first attracted the attention of astronomers when its large proper motion was first demonstrated by Giuseppe Piazzi in 1804. In 1838, Friedrich Wilhelm Bessel measured its distance from Earth at about 10.3 light years, very close to the actual value of about 11.4 light years; this was the first distance estimate for any star other than the Sun, and first star to have its stellar parallax measured. Among all stars or stellar systems listed in the modern Hipparcos Catalogue, 61 Cygni currently has the seventh highest proper motion, and the highest among all visible stars or systems.Over the course of the twentieth century, several different astronomers reported evidence of a massive planet orbiting one of the two stars, but recent high-precision radial velocity observations have shown that all such claims were unfounded. No habitable planets have been confirmed in this stellar system to date.".
- 61_Cygni thumbnail Cygnus_IAU.svg?width=300.
- 61_Cygni wikiPageExternalLink 61cyg.html.
- 61_Cygni wikiPageExternalLink 61cygni2.htm.
- 61_Cygni wikiPageID "36188".
- 61_Cygni wikiPageLength "43751".
- 61_Cygni wikiPageOutDegree "158".
- 61_Cygni wikiPageRevisionID "707321585".
- 61_Cygni wikiPageWikiLink 14_Tauri.
- 61_Cygni wikiPageWikiLink 68_Virginis.
- 61_Cygni wikiPageWikiLink Alpha_Centauri.
- 61_Cygni wikiPageWikiLink Angular_diameter.
- 61_Cygni wikiPageWikiLink Angular_distance.
- 61_Cygni wikiPageWikiLink Apparent_magnitude.
- 61_Cygni wikiPageWikiLink Apsis.
- 61_Cygni wikiPageWikiLink Asteroseismology.
- 61_Cygni wikiPageWikiLink Astronomical_unit.
- 61_Cygni wikiPageWikiLink BY_Draconis_variable.
- 61_Cygni wikiPageWikiLink Barnards_Star.
- 61_Cygni wikiPageWikiLink Barycenter.
- 61_Cygni wikiPageWikiLink Bayer_designation.
- 61_Cygni wikiPageWikiLink Benjamin_Boss.
- 61_Cygni wikiPageWikiLink Bernhard_von_Lindenau.
- 61_Cygni wikiPageWikiLink Beta_Columbae.
- 61_Cygni wikiPageWikiLink Binary_star.
- 61_Cygni wikiPageWikiLink Binoculars.
- 61_Cygni wikiPageWikiLink Bright_Star_Catalogue.
- 61_Cygni wikiPageWikiLink Brown_dwarf.
- 61_Cygni wikiPageWikiLink Byr.
- 61_Cygni wikiPageWikiLink Category:BY_Draconis_variables.
- 61_Cygni wikiPageWikiLink Category:Binary_stars.
- 61_Cygni wikiPageWikiLink Category:Cygnus_(constellation).
- 61_Cygni wikiPageWikiLink Category:Discoveries_by_Giuseppe_Piazzi.
- 61_Cygni wikiPageWikiLink Category:Durchmusterung_objects.
- 61_Cygni wikiPageWikiLink Category:Flamsteed_objects.
- 61_Cygni wikiPageWikiLink Category:Gliese_and_GJ_objects.
- 61_Cygni wikiPageWikiLink Category:HR_objects.
- 61_Cygni wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- 61_Cygni wikiPageWikiLink Category:High-proper-motion_stars.
- 61_Cygni wikiPageWikiLink Category:Hipparcos_objects.
- 61_Cygni wikiPageWikiLink Category:K-type_main-sequence_stars.
- 61_Cygni wikiPageWikiLink Category:Local_Bubble.
- 61_Cygni wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
- 61_Cygni wikiPageWikiLink Christian_Heinrich_Friedrich_Peters.
- 61_Cygni wikiPageWikiLink Chromosphere.
- 61_Cygni wikiPageWikiLink Circumstellar_habitable_zone.
- 61_Cygni wikiPageWikiLink Claude-Louis_Mathieu.
- 61_Cygni wikiPageWikiLink Common_Era.
- 61_Cygni wikiPageWikiLink Comoving_distance.
- 61_Cygni wikiPageWikiLink Constellation.
- 61_Cygni wikiPageWikiLink Cxc3xb4te_dAzur_Observatory.
- 61_Cygni wikiPageWikiLink Cygnus_(constellation).
- 61_Cygni wikiPageWikiLink Debris_disk.
- 61_Cygni wikiPageWikiLink Delta_Eridani.
- 61_Cygni wikiPageWikiLink Deneb.
- 61_Cygni wikiPageWikiLink Double_star.
- 61_Cygni wikiPageWikiLink Durchmusterung.
- 61_Cygni wikiPageWikiLink Dwarf_star.
- 61_Cygni wikiPageWikiLink Earth.
- 61_Cygni wikiPageWikiLink Epoch_(astronomy).
- 61_Cygni wikiPageWikiLink Epsilon_Eridani.
- 61_Cygni wikiPageWikiLink Exozodiacal_dust.
- 61_Cygni wikiPageWikiLink Flamsteed_designation.
- 61_Cygni wikiPageWikiLink Flare_star.
- 61_Cygni wikiPageWikiLink François_Arago.
- 61_Cygni wikiPageWikiLink Friedrich_Bessel.
- 61_Cygni wikiPageWikiLink Friedrich_Georg_Wilhelm_von_Struve.
- 61_Cygni wikiPageWikiLink Friedrich_Wilhelm_Argelander.
- 61_Cygni wikiPageWikiLink Giuseppe_Piazzi.
- 61_Cygni wikiPageWikiLink Gliese_Catalogue_of_Nearby_Stars.
- 61_Cygni wikiPageWikiLink Groombridge_1830.
- 61_Cygni wikiPageWikiLink Hal_Clement.
- 61_Cygni wikiPageWikiLink Heliometer.
- 61_Cygni wikiPageWikiLink Henry_Draper_Catalogue.
- 61_Cygni wikiPageWikiLink Hipparcos.
- 61_Cygni wikiPageWikiLink Infrared_excess.
- 61_Cygni wikiPageWikiLink James_Bradley.
- 61_Cygni wikiPageWikiLink John_Flamsteed.
- 61_Cygni wikiPageWikiLink Joseph_von_Fraunhofer.
- 61_Cygni wikiPageWikiLink Jupiter.
- 61_Cygni wikiPageWikiLink Jupiter_mass.
- 61_Cygni wikiPageWikiLink K-type_main-sequence_star.
- 61_Cygni wikiPageWikiLink Kaj_Aage_Gunnar_Strand.
- 61_Cygni wikiPageWikiLink Kapteyns_Star.
- 61_Cygni wikiPageWikiLink Königsberg.
- 61_Cygni wikiPageWikiLink Light-year.
- 61_Cygni wikiPageWikiLink Light_pollution.
- 61_Cygni wikiPageWikiLink List_of_Arabic_star_names.
- 61_Cygni wikiPageWikiLink List_of_nearest_stars_and_brown_dwarfs.
- 61_Cygni wikiPageWikiLink Main_sequence.
- 61_Cygni wikiPageWikiLink McDonald_Observatory.
- 61_Cygni wikiPageWikiLink Minute_and_second_of_arc.
- 61_Cygni wikiPageWikiLink Mission_of_Gravity.
- 61_Cygni wikiPageWikiLink Mu_Cassiopeiae.
- 61_Cygni wikiPageWikiLink NASA.
- 61_Cygni wikiPageWikiLink Naked_eye.
- 61_Cygni wikiPageWikiLink Neptune.
- 61_Cygni wikiPageWikiLink Orbital_eccentricity.
- 61_Cygni wikiPageWikiLink Orbital_elements.
- 61_Cygni wikiPageWikiLink Orbital_period.