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- 61_Cygni abstract "61 Cygni, sometimes called Bessel's Star or Piazzi's Flying Star, is a binary star system in the constellation Cygnus. It consists of a pair of K-type dwarf stars that orbit each other in a period of about 659 years, forming a visual binary. At fifth and sixth apparent magnitudes, they are among the least conspicuous stars visible in the night sky to an observer without an optical instrument.61 Cygni first attracted the attention of astronomers because of its large proper motion. 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. Over the course of the twentieth century, several different astronomers reported detections of a massive planet orbiting one of the two stars, but recent high-precision radial velocity observations have shown that all such claims were erroneous. To date, no planets have been confirmed in this system and all of the past claims are now considered spurious.".
- 61_Cygni thumbnail 61_cygni_map.png?width=300.
- 61_Cygni wikiPageExternalLink 61cyg.html.
- 61_Cygni wikiPageExternalLink 61cygni2.htm.
- 61_Cygni wikiPageID "36188".
- 61_Cygni wikiPageRevisionID "605660616".
- 61_Cygni absmagV "7.48".
- 61_Cygni appmagV "5.21".
- 61_Cygni appmagV "6.03".
- 61_Cygni bV "+1.139 / +1.320".
- 61_Cygni class "K5V / K7V".
- 61_Cygni colwidth "30".
- 61_Cygni component "61".
- 61_Cygni constell Cygnus_(constellation).
- 61_Cygni epoch Epoch_(astronomy).
- 61_Cygni equinox Epoch_(astronomy).
- 61_Cygni gravity "4.2".
- 61_Cygni gravity "4.4".
- 61_Cygni hasPhotoCollection 61_Cygni.
- 61_Cygni mass "0.63".
- 61_Cygni mass "0.7".
- 61_Cygni metal2Fe "–0.27".
- 61_Cygni metalFe "–0.20".
- 61_Cygni name "61".
- 61_Cygni pError "0.54".
- 61_Cygni parallax "285.88".
- 61_Cygni propMoDec "3144.17".
- 61_Cygni propMoDec "3259.39".
- 61_Cygni propMoRa "4109.17".
- 61_Cygni propMoRa "4156.93".
- 61_Cygni radialV "-64.3".
- 61_Cygni rotation "3055967.9999999995".
- 61_Cygni rotation "3269376.0".
- 61_Cygni uB "+1.155 / +1.242".
- 61_Cygni variable "A: BY Draconis".
- 61_Cygni variable "B: Flare star".
- 61_Cygni subject Category:BY_Draconis_variables.
- 61_Cygni subject Category:Binary_stars.
- 61_Cygni subject Category:Cygnus_(constellation).
- 61_Cygni subject Category:Durchmusterung_objects.
- 61_Cygni subject Category:Flamsteed_objects.
- 61_Cygni subject Category:Gliese_and_GJ_objects.
- 61_Cygni subject Category:HR_objects.
- 61_Cygni subject Category:Henry_Draper_Catalogue_objects.
- 61_Cygni subject Category:High-proper-motion_stars.
- 61_Cygni subject Category:Hipparcos_objects.
- 61_Cygni subject Category:K-type_main-sequence_stars.
- 61_Cygni subject Category:Objects_named_with_variable_star_designations.
- 61_Cygni subject Category:Objects_within_100_ly_of_Earth.
- 61_Cygni type CelestialBody.
- 61_Cygni type Star.
- 61_Cygni type PhysicalBody.
- 61_Cygni comment "61 Cygni, sometimes called Bessel's Star or Piazzi's Flying Star, is a binary star system in the constellation Cygnus. It consists of a pair of K-type dwarf stars that orbit each other in a period of about 659 years, forming a visual binary. At fifth and sixth apparent magnitudes, they are among the least conspicuous stars visible in the night sky to an observer without an optical instrument.61 Cygni first attracted the attention of astronomers because of its large proper motion.".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Cygni".
- 61_Cygni label "61 Лебедя".
- 61_Cygni label "はくちょう座61番星".
- 61_Cygni label "天鵝座61".
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs はくちょう座61番星.
- 61_Cygni sameAs 백조자리_61.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs 61_Cygni.
- 61_Cygni sameAs m.0907x.
- 61_Cygni sameAs Q249302.
- 61_Cygni sameAs Q249302.
- 61_Cygni wasDerivedFrom 61_Cygni?oldid=605660616.
- 61_Cygni depiction 61_cygni_map.png.
- 61_Cygni isPrimaryTopicOf 61_Cygni.
- 61_Cygni name "61 Cygni".