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- Beta_Herculis abstract "Beta Herculis (Beta Her, β Herculis, β Her), which has the traditional name Kornephoros, is the brightest star in the northern constellation of Hercules at a base apparent visual magnitude of 2.81. This is a suspected variable star with an apparent magnitude that may rise as high as 2.76. Based upon parallax measurements, it is located at a distance of 139 light-years (43 parsecs) from Earth.Although β Herculis appears to the naked eye to be a single star, in July 1899 the American astronomer W. W. Campbell discovered from spectroscopic measurements that its radial velocity varies, and concluded that it is a binary system. An orbit for the binary was computed in 1908 based upon additional spectroscopic measurements.At Palomar Observatory, Antoine Labeyrie and others used speckle interferometry with the Hale Telescope to resolve the system in 1977. The Hipparcos satellite observed the orbital motion of the primary relative to other stars, and an orbit was computed in 2005 using spectroscopic data together with these measurements. The period of the system is around 410 days. They have a high orbital eccentricity of 0.55 and the orbital plane is inclined 53.8° to the line of sight from the Earth.The primary star in this binary system has a stellar classification of G7 IIIa, indicating that it is a giant star that has exhausted the hydrogen at its core and evolved away from the main sequence. It has a mass nearly three times the mass of the Sun, and has expanded to 17 times the Sun's radius. The effective temperature of the star's outer envelope is about 4,887 K, which gives it the yellow hue of a G-type star. The secondary star has a mass only 90% that of the Sun.".
- Beta_Herculis thumbnail Hercules_IAU.svg?width=300.
- Beta_Herculis wikiPageID "3116538".
- Beta_Herculis wikiPageLength "15100".
- Beta_Herculis wikiPageOutDegree "75".
- Beta_Herculis wikiPageRevisionID "650424455".
- Beta_Herculis wikiPageWikiLink Alpha_Serpentis.
- Beta_Herculis wikiPageWikiLink Antoine_Émile_Henry_Labeyrie.
- Beta_Herculis wikiPageWikiLink Apparent_magnitude.
- Beta_Herculis wikiPageWikiLink Asterism_(astronomy).
- Beta_Herculis wikiPageWikiLink Bayer_designation.
- Beta_Herculis wikiPageWikiLink Beta_Serpentis.
- Beta_Herculis wikiPageWikiLink Binary_star.
- Beta_Herculis wikiPageWikiLink Bright_Star_Catalogue.
- Beta_Herculis wikiPageWikiLink Catalogues_of_Fundamental_Stars.
- Beta_Herculis wikiPageWikiLink Category:Bayer_objects.
- Beta_Herculis wikiPageWikiLink Category:Binary_stars.
- Beta_Herculis wikiPageWikiLink Category:Durchmusterung_objects.
- Beta_Herculis wikiPageWikiLink Category:Flamsteed_objects.
- Beta_Herculis wikiPageWikiLink Category:G-type_giants.
- Beta_Herculis wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- Beta_Herculis wikiPageWikiLink Category:Hercules_(constellation).
- Beta_Herculis wikiPageWikiLink Category:Hipparcos_objects.
- Beta_Herculis wikiPageWikiLink Category:Stars_with_proper_names.
- Beta_Herculis wikiPageWikiLink Category:Triple_stars.
- Beta_Herculis wikiPageWikiLink Chinese_language.
- Beta_Herculis wikiPageWikiLink Constellation.
- Beta_Herculis wikiPageWikiLink Crater-class_cargo_ship.
- Beta_Herculis wikiPageWikiLink Day.
- Beta_Herculis wikiPageWikiLink Delta_Ophiuchi.
- Beta_Herculis wikiPageWikiLink Delta_Serpentis.
- Beta_Herculis wikiPageWikiLink Durchmusterung.
- Beta_Herculis wikiPageWikiLink Effective_temperature.
- Beta_Herculis wikiPageWikiLink Epoch_(astronomy).
- Beta_Herculis wikiPageWikiLink Epsilon_Ophiuchi.
- Beta_Herculis wikiPageWikiLink Epsilon_Serpentis.
- Beta_Herculis wikiPageWikiLink Flamsteed_designation.
- Beta_Herculis wikiPageWikiLink Gamma_Herculis.
- Beta_Herculis wikiPageWikiLink Gamma_Serpentis.
- Beta_Herculis wikiPageWikiLink Giant_star.
- Beta_Herculis wikiPageWikiLink Greek_language.
- Beta_Herculis wikiPageWikiLink Hale_Telescope.
- Beta_Herculis wikiPageWikiLink Heavenly_Market_enclosure.
- Beta_Herculis wikiPageWikiLink Henry_Draper_Catalogue.
- Beta_Herculis wikiPageWikiLink Hercules_(constellation).
- Beta_Herculis wikiPageWikiLink Hipparcos.
- Beta_Herculis wikiPageWikiLink International_Celestial_Reference_System.
- Beta_Herculis wikiPageWikiLink Julian_day.
- Beta_Herculis wikiPageWikiLink Kappa_Herculis.
- Beta_Herculis wikiPageWikiLink Latin.
- Beta_Herculis wikiPageWikiLink Main_sequence.
- Beta_Herculis wikiPageWikiLink Minute_and_second_of_arc.
- Beta_Herculis wikiPageWikiLink Orbital_eccentricity.
- Beta_Herculis wikiPageWikiLink Palomar_Observatory.
- Beta_Herculis wikiPageWikiLink Parallax.
- Beta_Herculis wikiPageWikiLink Radial_velocity.
- Beta_Herculis wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- Beta_Herculis wikiPageWikiLink Solar_mass.
- Beta_Herculis wikiPageWikiLink Solar_radius.
- Beta_Herculis wikiPageWikiLink Speckle_imaging.
- Beta_Herculis wikiPageWikiLink Stellar_classification.
- Beta_Herculis wikiPageWikiLink Tang_dynasty.
- Beta_Herculis wikiPageWikiLink USS_Ruticulus_(AK-113).
- Beta_Herculis wikiPageWikiLink United_States_Navy.
- Beta_Herculis wikiPageWikiLink Variable_star.
- Beta_Herculis wikiPageWikiLink Wang_Chongrong.
- Beta_Herculis wikiPageWikiLink Washington_Double_Star_Catalog.
- Beta_Herculis wikiPageWikiLink William_Wallace_Campbell.
- Beta_Herculis wikiPageWikiLink Yuncheng.
- Beta_Herculis wikiPageWikiLink Zeta_Ophiuchi.
- Beta_Herculis wikiPageWikiLink File:Cercle_rouge_100%25.svg.
- Beta_Herculis wikiPageWikiLink File:Hercules_IAU.svg.
- Beta_Herculis wikiPageWikiLinkText "Beta Herculis".
- Beta_Herculis wikiPageWikiLinkText "Kornephoros".
- Beta_Herculis wikiPageWikiLinkText "beta star".
- Beta_Herculis wikiPageWikiLinkText "β Her".
- Beta_Herculis wikiPageWikiLinkText "β Herculis".
- Beta_Herculis absmagV "−0.49 ± 0.10".
- Beta_Herculis appmagV "2.81".
- Beta_Herculis axisUnitless Minute_and_second_of_arc.
- Beta_Herculis axisUnitless "11.37".
- Beta_Herculis bV "+0.91".
- Beta_Herculis class "G7 IIIa".
- Beta_Herculis component "A".
- Beta_Herculis component "B".
- Beta_Herculis constell Hercules_(constellation).
- Beta_Herculis eccentricity "0.55".
- Beta_Herculis epoch Epoch_(astronomy).
- Beta_Herculis equinox "J2000.0".
- Beta_Herculis gravity "2.5".
- Beta_Herculis inclination "53.8".
- Beta_Herculis luminosity "151".
- Beta_Herculis mass "0.9".
- Beta_Herculis mass "2.9".
- Beta_Herculis metalFe "–0.27".
- Beta_Herculis node "341.9".
- Beta_Herculis pError "0.58".
- Beta_Herculis parallax "23.44".
- Beta_Herculis periargPrimary "24.6".
- Beta_Herculis periastron "15500.4".