Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/HD_12039> ?p ?o }
- HD_12039 abstract "HD 12039 is a variable star in the constellation of Cetus at a distance of about 133 ly (41 pc). It is categorized as a BY Draconis variable because of luminosity changes caused by surface magnetic activity coupled with rotation of the star. The stellar classification G4V is similar to our own Sun, indicating this is a main sequence star that is generating energy at its core through the thermonuclear fusion of hydrogen. The effective temperature of 5,585 K gives the star a yellow hue. It has about the same mass as the Sun, but only emits 89% of the Sun's luminosity. This is a young star with age estimates ranging from 7.5−8 million years to 30 million years.In 2006, a debris field was discovered in orbit around this star using infrared observations by the Spitzer telescope. This debris is thought to be an asteroid belt. The measured temperature of the debris is 110°K, which places it in an orbit between 4 and 6 AU from the star, or about the same distance where Jupiter orbits our Sun. This debris disk may have been created by the breakup of a single, 100 km diameter planetesimal through a collision. The star system does not show any excess emission at 70 μm, indicating it does not have a cold outer dust disk.The star was examined for the presence of an extrasolar planet with a mass in the range 2-10 Jupiter masses and an orbital distance of 3-15.5 AU. Instead, in 2007, a close stellar companion was likely discovered. This object is separated from the primary by 0.15 arcseconds, making it unlikely to be a background object.This star has been proposed as a member of the Tucana-Horoglium Association (T-WA), a stream of young stars with a common motion through space. The T-WA association is about 30 million years old. The space velocity components of this star are [U, V, W] = [−0.6, −16.3, 5.0] km/s. It is orbiting the Milky Way galaxy with an orbital eccentricity of 0.06, with a distance that varies from 7.11−8.01 kpc of the galactic core. The inclination of its orbit carries it as far as 90 parsecs above the galactic plane.".
- HD_12039 wikiPageExternalLink 779-feature05-27-Spitzer-Team-Says-Debris-Disk-Could-Be-Forming-Infant-Terrestrial-Planets.
- HD_12039 wikiPageID "3445830".
- HD_12039 wikiPageLength "11724".
- HD_12039 wikiPageOutDegree "38".
- HD_12039 wikiPageRevisionID "640051936".
- HD_12039 wikiPageWikiLink Arcsecond.
- HD_12039 wikiPageWikiLink Asteroid.
- HD_12039 wikiPageWikiLink Astronomical_Unit.
- HD_12039 wikiPageWikiLink Astronomical_unit.
- HD_12039 wikiPageWikiLink BY_Draconis_variable.
- HD_12039 wikiPageWikiLink Category:BY_Draconis_variables.
- HD_12039 wikiPageWikiLink Category:Cetus_(constellation).
- HD_12039 wikiPageWikiLink Category:Circumstellar_disks.
- HD_12039 wikiPageWikiLink Category:G-type_main-sequence_stars.
- HD_12039 wikiPageWikiLink Category:Henry_Draper_Catalogue_objects.
- HD_12039 wikiPageWikiLink Category:Objects_named_with_variable_star_designations.
- HD_12039 wikiPageWikiLink Cetus.
- HD_12039 wikiPageWikiLink Constellation.
- HD_12039 wikiPageWikiLink Debris_disk.
- HD_12039 wikiPageWikiLink Durchmusterung.
- HD_12039 wikiPageWikiLink Effective_temperature.
- HD_12039 wikiPageWikiLink Exoplanet.
- HD_12039 wikiPageWikiLink Extrasolar_planet.
- HD_12039 wikiPageWikiLink Henry_Draper_Catalogue.
- HD_12039 wikiPageWikiLink Hipparcos.
- HD_12039 wikiPageWikiLink Hipparcos_catalogue.
- HD_12039 wikiPageWikiLink Inclination.
- HD_12039 wikiPageWikiLink Infrared.
- HD_12039 wikiPageWikiLink Infrared_excess.
- HD_12039 wikiPageWikiLink Jupiter.
- HD_12039 wikiPageWikiLink Main_sequence.
- HD_12039 wikiPageWikiLink Milky_Way.
- HD_12039 wikiPageWikiLink Minute_and_second_of_arc.
- HD_12039 wikiPageWikiLink Orbital_eccentricity.
- HD_12039 wikiPageWikiLink Orbital_inclination.
- HD_12039 wikiPageWikiLink Planetesimal.
- HD_12039 wikiPageWikiLink Smithsonian_Astrophysical_Observatory_Star_Catalog.
- HD_12039 wikiPageWikiLink Space_velocity_(astronomy).
- HD_12039 wikiPageWikiLink Spitzer_Space_Telescope.
- HD_12039 wikiPageWikiLink Spitzer_space_telescope.
- HD_12039 wikiPageWikiLink Stellar_classification.
- HD_12039 wikiPageWikiLink Stellar_kinematics.
- HD_12039 wikiPageWikiLink Stellar_magnetic_field.
- HD_12039 wikiPageWikiLink Stellar_rotation.
- HD_12039 wikiPageWikiLink Sun.
- HD_12039 wikiPageWikiLink Thermonuclear_fusion.
- HD_12039 wikiPageWikiLink Variable_star.
- HD_12039 wikiPageWikiLinkText "HD 12039".
- HD_12039 absmagV "5.03".
- HD_12039 age "7.5".
- HD_12039 appmagV "8".
- HD_12039 class "G4V".
- HD_12039 colwidth "30".
- HD_12039 constell Cetus.
- HD_12039 epoch "J2000".
- HD_12039 hasPhotoCollection HD_12039.
- HD_12039 luminosity "0.89".
- HD_12039 mass "1.02".
- HD_12039 metalFe "-0.28".
- HD_12039 pError "0.67".
- HD_12039 parallax "24.45".
- HD_12039 propMoDec "−50.60".
- HD_12039 propMoRa "+105.08".
- HD_12039 radialV "+5.7 ± 0.3".
- HD_12039 rotationalVelocity "15.2".
- HD_12039 temperature "5585".
- HD_12039 variable BY_Draconis_variable.
- HD_12039 wikiPageUsesTemplate Template:Cite_news.
- HD_12039 wikiPageUsesTemplate Template:Convert.
- HD_12039 wikiPageUsesTemplate Template:Reflist.
- HD_12039 wikiPageUsesTemplate Template:Starbox_astrometry.
- HD_12039 wikiPageUsesTemplate Template:Starbox_begin.
- HD_12039 wikiPageUsesTemplate Template:Starbox_catalog.
- HD_12039 wikiPageUsesTemplate Template:Starbox_character.
- HD_12039 wikiPageUsesTemplate Template:Starbox_detail.
- HD_12039 wikiPageUsesTemplate Template:Starbox_end.
- HD_12039 wikiPageUsesTemplate Template:Starbox_observe.
- HD_12039 wikiPageUsesTemplate Template:Stars_of_Cetus.
- HD_12039 subject Category:BY_Draconis_variables.
- HD_12039 subject Category:Cetus_(constellation).
- HD_12039 subject Category:Circumstellar_disks.
- HD_12039 subject Category:G-type_main-sequence_stars.
- HD_12039 subject Category:Henry_Draper_Catalogue_objects.
- HD_12039 subject Category:Objects_named_with_variable_star_designations.
- HD_12039 hypernym Star.
- HD_12039 type Article.
- HD_12039 type CelestialBody.
- HD_12039 type Place.
- HD_12039 type Planet.
- HD_12039 type Star.
- HD_12039 type Article.
- HD_12039 type Planet.
- HD_12039 type Variable.
- HD_12039 type Location.
- HD_12039 type Place.
- HD_12039 type Thing.
- HD_12039 comment "HD 12039 is a variable star in the constellation of Cetus at a distance of about 133 ly (41 pc). It is categorized as a BY Draconis variable because of luminosity changes caused by surface magnetic activity coupled with rotation of the star. The stellar classification G4V is similar to our own Sun, indicating this is a main sequence star that is generating energy at its core through the thermonuclear fusion of hydrogen. The effective temperature of 5,585 K gives the star a yellow hue.".
- HD_12039 label "HD 12039".
- HD_12039 sameAs DK_Ceti.