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- HD_190228 abstract "HD 190228 is a star located in the constellation Vulpecula. Its apparent magnitude is 7.31 and the absolute magnitude is 3.34. The distance is 204 light years from Earth. The star is definitely old with age over 10 billion years and it is metal-poor.In 2000, it was announced that a giant planet was orbiting the star with a minimum mass of 5 Jupiter masses, designated HD 190228 b. The planetary nature of the object was questioned because of the low metal content of the star: giant planets are more likely to be found around high-metallicity stars, so it was argued that the object was more likely to be a brown dwarf. Later astrometric measurements confirmed this: HD 190228 b is in fact a brown dwarf of 49.4 Jupiter masses in a nearly face-on orbit. The brown dwarf takes 1146 days to orbit the star, and the orbit is elliptical with an eccentricity of 0.5.".
- HD_190228 wikiPageID "14726522".
- HD_190228 wikiPageRevisionID "600460572".
- HD_190228 appmagV "7.307".
- HD_190228 aricns "4799".
- HD_190228 component "HD 190228 b".
- HD_190228 component "HD 190228".
- HD_190228 constell Vulpecula.
- HD_190228 eccentricity "0.5".
- HD_190228 epe "HD+190228".
- HD_190228 epoch "J2000.0".
- HD_190228 gravity "4.02".
- HD_190228 hasPhotoCollection HD_190228.
- HD_190228 inclination "4.3".
- HD_190228 mass "0.0472".
- HD_190228 mass "0.83".
- HD_190228 metal "[Fe/H]=-0.24 ± 0.06".
- HD_190228 node "61".
- HD_190228 pError "0.6".
- HD_190228 parallax "16".
- HD_190228 periargPrimary "100.7".
- HD_190228 periodUnitless "1382400.0".
- HD_190228 simbad "HD+190228".
- HD_190228 temperature "5360".
- HD_190228 subject Category:Brown_dwarfs.
- HD_190228 subject Category:G-type_subgiants.
- HD_190228 subject Category:Henry_Draper_Catalogue_objects.
- HD_190228 subject Category:Hipparcos_objects.
- HD_190228 subject Category:Vulpecula_(constellation).
- HD_190228 type CelestialBody.
- HD_190228 type Star.
- HD_190228 type PhysicalBody.
- HD_190228 comment "HD 190228 is a star located in the constellation Vulpecula. Its apparent magnitude is 7.31 and the absolute magnitude is 3.34. The distance is 204 light years from Earth. The star is definitely old with age over 10 billion years and it is metal-poor.In 2000, it was announced that a giant planet was orbiting the star with a minimum mass of 5 Jupiter masses, designated HD 190228 b.".
- HD_190228 label "HD 190228".
- HD_190228 label "HD 190228".
- HD_190228 label "HD 190228".
- HD_190228 label "HD 190228".
- HD_190228 label "HD 190228".
- HD_190228 sameAs HD_190228.
- HD_190228 sameAs HD_190228.
- HD_190228 sameAs m.03gvqf0.
- HD_190228 sameAs Q1563239.
- HD_190228 sameAs Q1563239.
- HD_190228 wasDerivedFrom HD_190228?oldid=600460572.
- HD_190228 isPrimaryTopicOf HD_190228.
- HD_190228 name "HD 190228".