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About: HD 12039     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Whole100003553, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingplacedbo:Locationschema:Placecelestial bodyyago:WikicatBYDraconisVariablesyago:WikicatVariableStarsyago:WikicatObjectsNamedWithVariableStarDesignationsyago:WikicatStarsyago:CelestialBody109239740yago:NaturalObject100019128yago:Object100002684yago:PhysicalEntity100001930yago:WikicatG-typeMain-sequenceStarsyago:WikicatG-typeStarsyago:WikicatHenryDraperCatalogueObjectsstaryago:Star109444100yago:Thing100002452yago:Variable109468959yago:VariableStar109469152yago:Whole100003553 New Facet based on Instances of this Class

HD 12039, also known as DK Ceti, is a variable star in the constellation of Cetus at a distance of 135 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 the 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.