Matches in DBpedia 2014 for { <http://dbpedia.org/resource/HR_8799> ?p ?o. }
Showing items 1 to 86 of
86
with 100 items per page.
- HR_8799 abstract "HR 8799 is a young (~30 million-year-old) main-sequence star located 129 light years (39 parsecs) away from Earth in the constellation of Pegasus, with roughly 1.5 times the Sun's mass and 4.9 times its luminosity. It is part of a system that also contains a debris disk and at least four massive planets. Those planets, along with Fomalhaut b, were the first extrasolar planets whose orbital motion was confirmed via direct imaging. The designation HR 8799 is the star's identifier in the Bright Star Catalogue. The star is a Gamma Doradus variable: its luminosity changes because of non-radial pulsations of its surface. The star is also classified as a Lambda Boötis star, which means its surface layers are depleted in iron peak elements. This may be due to the accretion of metal-poor circumstellar gas. It is the only known star which is simultaneously a Gamma Doradus variable, a Lambda Boötis type, and a Vega-like star (a star with excess infrared emission caused by a circumstellar disk).".
- HR_8799 thumbnail Benjamin_Zuckerman_HR_8799_planets_image_Dec._2010.jpg?width=300.
- HR_8799 wikiPageExternalLink image_feature_1320.html.
- HR_8799 wikiPageID "20198736".
- HR_8799 wikiPageRevisionID "605591316".
- HR_8799 age "30000000".
- HR_8799 appmagV "5.964".
- HR_8799 bV "0.234".
- HR_8799 class "kA5 hF0 mA5 V; λ Boo".
- HR_8799 colwidth "30".
- HR_8799 constell Pegasus_(constellation).
- HR_8799 disk "Dust disk".
- HR_8799 eccentricity ">0.04".
- HR_8799 eccentricity "?".
- HR_8799 epe "HR+8799".
- HR_8799 epoch Epoch_(astronomy).
- HR_8799 equinox "J2000.0".
- HR_8799 exoplanet HR_8799_b.
- HR_8799 exoplanet HR_8799_c.
- HR_8799 exoplanet HR_8799_d.
- HR_8799 exoplanet HR_8799_e.
- HR_8799 hasPhotoCollection HR_8799.
- HR_8799 inclination "28".
- HR_8799 mass "5".
- HR_8799 mass "7".
- HR_8799 nsted "HR+8799".
- HR_8799 pError "0.7".
- HR_8799 parallax "25.38".
- HR_8799 periapsis "6".
- HR_8799 period "~100".
- HR_8799 period "~190".
- HR_8799 period "~45".
- HR_8799 period "~460".
- HR_8799 periodUnit "year".
- HR_8799 radialV "−11.5 ± 2".
- HR_8799 radius "1.2".
- HR_8799 radius "?".
- HR_8799 semimajor "14.5".
- HR_8799 semimajor "24".
- HR_8799 semimajor "38".
- HR_8799 semimajor "68".
- HR_8799 simbad "HR+8799".
- HR_8799 uB "−0.04".
- HR_8799 variable Gamma_Doradus_variable.
- HR_8799 subject Category:A-type_main-sequence_stars.
- HR_8799 subject Category:Circumstellar_disks.
- HR_8799 subject Category:Gamma_Doradus_variables.
- HR_8799 subject Category:HR_8799.
- HR_8799 subject Category:HR_objects.
- HR_8799 subject Category:Henry_Draper_Catalogue_objects.
- HR_8799 subject Category:Hipparcos_objects.
- HR_8799 subject Category:Lambda_Boötis_stars.
- HR_8799 subject Category:Objects_named_with_variable_star_designations.
- HR_8799 subject Category:Pegasus_(constellation).
- HR_8799 subject Category:Planetary_systems_with_four_confirmed_planets.
- HR_8799 type CelestialBody.
- HR_8799 type Star.
- HR_8799 type PhysicalBody.
- HR_8799 comment "HR 8799 is a young (~30 million-year-old) main-sequence star located 129 light years (39 parsecs) away from Earth in the constellation of Pegasus, with roughly 1.5 times the Sun's mass and 4.9 times its luminosity. It is part of a system that also contains a debris disk and at least four massive planets. Those planets, along with Fomalhaut b, were the first extrasolar planets whose orbital motion was confirmed via direct imaging.".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "HR 8799".
- HR_8799 label "飛馬座V342".
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs HR_8799.
- HR_8799 sameAs m.04ygnd6.
- HR_8799 sameAs Q584300.
- HR_8799 sameAs Q584300.
- HR_8799 wasDerivedFrom HR_8799?oldid=605591316.
- HR_8799 depiction Benjamin_Zuckerman_HR_8799_planets_image_Dec._2010.jpg.
- HR_8799 isPrimaryTopicOf HR_8799.
- HR_8799 name "HR 8799".
