Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/HR_8799_b> ?p ?o }
- HR_8799_b abstract "HR 8799 b is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis star HR 8799. It has a mass between 4 and 7 Jupiter masses and a radius from 10 to 30% larger than Jupiter's. It orbits at 68 AU from HR 8799 (or 7 AU inside the inner edge of the dust disk orbiting the star) with an unknown eccentricity and a period of 460 years, and is the outermost known planet in the HR 8799 system. Along with two other planets orbiting HR 8799, the planet was discovered on November 13, 2008 by Marois et al., using the Keck and Gemini observatories in Hawaii. These planets were discovered using the direct imaging technique.In 2009 it was discovered that the Hubble Space Telescope had in fact directly imaged HR 8799 b eleven years earlier, in 1998, suggesting that more exoplanets might be revealed through analysis of HST photographic archives. Additional precovery images were also obtained by reanalyzing data taken in 2002 at the Subaru Telescope and in 2005 and 2007 at the W.M Keck Observatory .Broadband photometry of HR 8799 b shows that it has thicker clouds in its atmosphere than do older, higher surface gravity substellar objects of the same effective temperature.Near infrared H band and K band spectroscopy of HR8799b published in May 2011 indicate a hydrogen rich, dusty atmosphere with disequilibrium CO / CH4 chemistry.Near infrared spectroscopy from 995 to 1769 nanometers made with the Palomar Obervatory show evidence of ammonia and/or acetylene as well as carbon dioxide, and some methane.".
- HR_8799_b thumbnail Exoplanet_Comparison_HR_8799_b.png?width=300.
- HR_8799_b wikiPageExternalLink planete.php?etoile=HR+8799&planete=b.
- HR_8799_b wikiPageID "20239632".
- HR_8799_b wikiPageLength "10570".
- HR_8799_b wikiPageOutDegree "31".
- HR_8799_b wikiPageRevisionID "702693403".
- HR_8799_b wikiPageWikiLink Apparent_magnitude.
- HR_8799_b wikiPageWikiLink Astronomical_unit.
- HR_8799_b wikiPageWikiLink Bright_Star_Catalogue.
- HR_8799_b wikiPageWikiLink Category:Exoplanets_detected_by_direct_imaging.
- HR_8799_b wikiPageWikiLink Category:Exoplanets_discovered_in_2008.
- HR_8799_b wikiPageWikiLink Category:Giant_planets.
- HR_8799_b wikiPageWikiLink Category:HR_8799.
- HR_8799_b wikiPageWikiLink Category:Pegasus_(constellation).
- HR_8799_b wikiPageWikiLink Circumstellar_disc.
- HR_8799_b wikiPageWikiLink Constellation.
- HR_8799_b wikiPageWikiLink Exoplanet.
- HR_8799_b wikiPageWikiLink Fomalhaut_b.
- HR_8799_b wikiPageWikiLink Gemini_Observatory.
- HR_8799_b wikiPageWikiLink HR_8799.
- HR_8799_b wikiPageWikiLink Hawaii.
- HR_8799_b wikiPageWikiLink Henry_Draper_Catalogue.
- HR_8799_b wikiPageWikiLink Hubble_Space_Telescope.
- HR_8799_b wikiPageWikiLink Jupiter.
- HR_8799_b wikiPageWikiLink Jupiter_mass.
- HR_8799_b wikiPageWikiLink Lambda_Boötis_star.
- HR_8799_b wikiPageWikiLink Light-year.
- HR_8799_b wikiPageWikiLink Methods_of_detecting_exoplanets.
- HR_8799_b wikiPageWikiLink Pegasus_(constellation).
- HR_8799_b wikiPageWikiLink W._M._Keck_Observatory.
- HR_8799_b wikiPageWikiLink File:Planet_around_HR_8799.jpg.
- HR_8799_b wikiPageWikiLinkText "HR 8799 b".
- HR_8799_b wikiPageWikiLinkText "HR8799b".
- HR_8799_b wikiPageWikiLinkText "b".
- HR_8799_b appMag "5.964".
- HR_8799_b class "kA5 hF0 mA5 V; λ Boo".
- HR_8799_b constell Pegasus_(constellation).
- HR_8799_b density "2.91".
- HR_8799_b discoverers "Marois et al.".
- HR_8799_b discoveryDate "2008-11-13".
- HR_8799_b discoveryMethod Methods_of_detecting_exoplanets.
- HR_8799_b discoverySite "Keck and Geminiobservatories in Hawaii".
- HR_8799_b discoveryStatus "Published".
- HR_8799_b distLy "129".
- HR_8799_b distPc "39".
- HR_8799_b epoch "2008-09-18".
- HR_8799_b mass "5".
- HR_8799_b periodYear "~ 460".
- HR_8799_b planet "b".
- HR_8799_b positionAngle "62.42".
- HR_8799_b radius "1.2".
- HR_8799_b semimajor "~ 68".
- HR_8799_b semimajorGm "~ 10000".
- HR_8799_b separation "68".
- HR_8799_b separationMas "1724".
- HR_8799_b simbad "HD+218396b".
- HR_8799_b star HR_8799.
- HR_8799_b star "HR+8799".
- HR_8799_b temperature "870".
- HR_8799_b wikiPageUsesTemplate Template:Cite_web.
- HR_8799_b wikiPageUsesTemplate Template:Commons_category-inline.
- HR_8799_b wikiPageUsesTemplate Template:DEC.
- HR_8799_b wikiPageUsesTemplate Template:HR_8799.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_begin.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_catalog.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_character.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_discovery.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_end.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_image.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_orbit.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_reference.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_separation.
- HR_8799_b wikiPageUsesTemplate Template:Planetbox_star.
- HR_8799_b wikiPageUsesTemplate Template:RA.
- HR_8799_b wikiPageUsesTemplate Template:Reflist.
- HR_8799_b wikiPageUsesTemplate Template:Sky.
- HR_8799_b wikiPageUsesTemplate Template:±.
- HR_8799_b subject Category:Exoplanets_detected_by_direct_imaging.
- HR_8799_b subject Category:Exoplanets_discovered_in_2008.
- HR_8799_b subject Category:Giant_planets.
- HR_8799_b subject Category:HR_8799.
- HR_8799_b subject Category:Pegasus_(constellation).
- HR_8799_b hypernym Planet.
- HR_8799_b type Planet.
- HR_8799_b type Type.
- HR_8799_b type Exoplanet.
- HR_8799_b type Object.
- HR_8799_b type Planet.
- HR_8799_b type Type.
- HR_8799_b comment "HR 8799 b is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis star HR 8799. It has a mass between 4 and 7 Jupiter masses and a radius from 10 to 30% larger than Jupiter's. It orbits at 68 AU from HR 8799 (or 7 AU inside the inner edge of the dust disk orbiting the star) with an unknown eccentricity and a period of 460 years, and is the outermost known planet in the HR 8799 system.".
- HR_8799_b label "HR 8799 b".
- HR_8799_b sameAs Q1334636.
- HR_8799_b sameAs HR_8799_b.
- HR_8799_b sameAs HR_8799_b.
- HR_8799_b sameAs HR_8799_b.
- HR_8799_b sameAs HR_8799_b.
- HR_8799_b sameAs HR_8799_b.
- HR_8799_b sameAs HR_8799_b.
- HR_8799_b sameAs HR_8799_b.