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- Theta_Cygni abstract "Theta Cygni (θ Cygni, θ Cyg) is a star in the northern constellation of Cygnus. It has an apparent visual magnitude of 4.5, so it can be seen from the northern hemisphere with the naked eye in sufficiently dark skies. Based upon parallax measurements, it is at a distance of about 59.8 light-years (18.3 parsecs) from the Earth. It is suspected of hosting an extrasolar planet.The spectrum of this star matches a stellar classification of F3 V. The luminosity class 'V' is associated with a category of stars called main sequence, which, like the Sun, are generating energy through the nuclear fusion of hydrogen at their cores. The outer envelope of this star is radiating 4.2 times the luminosity of the Sun at an effective temperature of about 6,381 K, which gives it the yellow-white hue typical of F-type stars. Theta Cygni is larger than the Sun, with about 38% more mass and a 58% greater radius. The estimated age of this star is probably in the range of 0.6–1.9 billion years.Theta Cygni has a faint companion star at an angular separation of about three arcseconds and a position angle of 56°. This star has an apparent visual magnitude of 13.03, which is too faint to be seen without a telescope. It is a red dwarf star with a stellar classification of M3 V and an estimated mass of about 0.33 times the mass of the Sun. Both components of this system are traveling together through space with a high proper motion of 0.261 arcseconds per year, or 0.4° per century.".
- Theta_Cygni thumbnail Cygnus_IAU.svg?width=300.
- Theta_Cygni wikiPageID "4694890".
- Theta_Cygni wikiPageRevisionID "593179313".
- Theta_Cygni absmagV "3.14".
- Theta_Cygni ageGyr "1.3".
- Theta_Cygni appmagV "4.49".
- Theta_Cygni bV "+0.38".
- Theta_Cygni component "θ Cyg A".
- Theta_Cygni component "θ Cyg B".
- Theta_Cygni constell Cygnus_(constellation).
- Theta_Cygni eccentricity "0".
- Theta_Cygni epoch Epoch_(astronomy).
- Theta_Cygni exoplanet Theta_Cygni.
- Theta_Cygni gravity "4.3".
- Theta_Cygni hasPhotoCollection Theta_Cygni.
- Theta_Cygni mass "0.33".
- Theta_Cygni mass "≈2.3".
- Theta_Cygni metalFe "0.01".
- Theta_Cygni pError "0.15".
- Theta_Cygni parallax "54.54".
- Theta_Cygni period "154.5".
- Theta_Cygni propMoDec "+262.45".
- Theta_Cygni propMoRa "–8.87".
- Theta_Cygni radialV "–27.4".
- Theta_Cygni rotationalVelocity "7".
- Theta_Cygni semimajor "0.635".
- Theta_Cygni uB "–0.03".
- Theta_Cygni subject Category:Bayer_objects.
- Theta_Cygni subject Category:Cygnus_(constellation).
- Theta_Cygni subject Category:F-type_main-sequence_stars.
- Theta_Cygni subject Category:Flamsteed_objects.
- Theta_Cygni subject Category:Hypothetical_planetary_systems.
- Theta_Cygni type BayerObjects.
- Theta_Cygni type CelestialBody109239740.
- Theta_Cygni type F-typeMainSequenceStars.
- Theta_Cygni type FlamsteedObjects.
- Theta_Cygni type NaturalObject100019128.
- Theta_Cygni type Object100002684.
- Theta_Cygni type PhysicalEntity100001930.
- Theta_Cygni type Star109444100.
- Theta_Cygni type Whole100003553.
- Theta_Cygni type CelestialBody.
- Theta_Cygni type Star.
- Theta_Cygni type PhysicalBody.
- Theta_Cygni comment "Theta Cygni (θ Cygni, θ Cyg) is a star in the northern constellation of Cygnus. It has an apparent visual magnitude of 4.5, so it can be seen from the northern hemisphere with the naked eye in sufficiently dark skies. Based upon parallax measurements, it is at a distance of about 59.8 light-years (18.3 parsecs) from the Earth. It is suspected of hosting an extrasolar planet.The spectrum of this star matches a stellar classification of F3 V.".
- Theta_Cygni label "Theta Cygni".
- Theta_Cygni label "Theta Cygni".
- Theta_Cygni label "奚仲三".
- Theta_Cygni sameAs Theta_Cygni.
- Theta_Cygni sameAs m.0chrnc.
- Theta_Cygni sameAs Q3304173.
- Theta_Cygni sameAs Q3304173.
- Theta_Cygni sameAs Theta_Cygni.
- Theta_Cygni wasDerivedFrom Theta_Cygni?oldid=593179313.
- Theta_Cygni depiction Cygnus_IAU.svg.
- Theta_Cygni isPrimaryTopicOf Theta_Cygni.
- Theta_Cygni name "Theta Cygni A/B".