Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/Cygnus_OB2-12> ?p ?o }
- Cygnus_OB2-12 abstract "Cygnus OB2 #12 is an extremely bright blue hypergiant with an absolute bolometric magnitude (all electromagnetic radiation) of −10.9, among the most luminous stars known in the galaxy. This makes the star nearly two million times more luminous than the Sun, although less than half the estimates when the star was first discovered. It is now known to be a binary, with the companion approximately a tenth as bright. A very approximate initial estimate of the orbit gives the total system mass as 120 M☉ and the period as 30 years.It is a member of the Cyg OB2 Association, a cluster of young massive stars about 5,000 light years away in Cygnus, and resides in a region of the Milky Way from which visible light is heavily absorbed by interstellar dust when viewed from Earth. The dust causes the star to be strongly reddened despite being an intrinsically hot and blue star, hence it has been extensively studied in the infra-red. Were it not for the dust extinction, the star would have a visual magnitude about 1.5, nearly as bright as Deneb (Alpha Cygni), but because of the dust the observed visual magnitude is 11.4 so that it requires binoculars or a small telescope to be seen.Cygnus OB2 #12 is a candidate luminous blue variable (LBV). Its position in the HR diagram, luminosity, and spectrum all classify it as an LBV, but it has not been observed to vary in brightness. The spectral type has varied slightly since its discovery, but not to the extent that would be normal for an LBV.".
- Cygnus_OB2-12 wikiPageExternalLink brightest.htm.
- Cygnus_OB2-12 wikiPageExternalLink cygnus-ob2-12.shtml.
- Cygnus_OB2-12 wikiPageExternalLink cyg-ob2-12.html.
- Cygnus_OB2-12 wikiPageID "16782221".
- Cygnus_OB2-12 wikiPageLength "7101".
- Cygnus_OB2-12 wikiPageOutDegree "20".
- Cygnus_OB2-12 wikiPageRevisionID "683528213".
- Cygnus_OB2-12 wikiPageWikiLink 2MASS.
- Cygnus_OB2-12 wikiPageWikiLink Absolute_magnitude.
- Cygnus_OB2-12 wikiPageWikiLink Bolometric_magnitude.
- Cygnus_OB2-12 wikiPageWikiLink Category:B-type_hypergiants.
- Cygnus_OB2-12 wikiPageWikiLink Category:Cygnus_(constellation).
- Cygnus_OB2-12 wikiPageWikiLink Category:Hipparcos_objects.
- Cygnus_OB2-12 wikiPageWikiLink Category:Luminous_blue_variables.
- Cygnus_OB2-12 wikiPageWikiLink Cygnus_(constellation).
- Cygnus_OB2-12 wikiPageWikiLink Cygnus_OB2.
- Cygnus_OB2-12 wikiPageWikiLink D.H._Schulte.
- Cygnus_OB2-12 wikiPageWikiLink Deneb.
- Cygnus_OB2-12 wikiPageWikiLink Extinction_(astronomy).
- Cygnus_OB2-12 wikiPageWikiLink HR_diagram.
- Cygnus_OB2-12 wikiPageWikiLink Hertzsprung–Russell_diagram.
- Cygnus_OB2-12 wikiPageWikiLink Hipparcos.
- Cygnus_OB2-12 wikiPageWikiLink Hipparcos_catalogue.
- Cygnus_OB2-12 wikiPageWikiLink Hypergiant.
- Cygnus_OB2-12 wikiPageWikiLink List_of_most_luminous_known_stars.
- Cygnus_OB2-12 wikiPageWikiLink List_of_most_luminous_stars.
- Cygnus_OB2-12 wikiPageWikiLink Luminous_blue_variable.
- Cygnus_OB2-12 wikiPageWikiLink Milky_Way.
- Cygnus_OB2-12 wikiPageWikiLink New_Catalogue_of_Suspected_Variable_Stars.
- Cygnus_OB2-12 wikiPageWikiLink Telescope.
- Cygnus_OB2-12 wikiPageWikiLinkText "#12".
- Cygnus_OB2-12 wikiPageWikiLinkText "Cyg OB2 #12".
- Cygnus_OB2-12 wikiPageWikiLinkText "Cygnus OB2 #12".
- Cygnus_OB2-12 wikiPageWikiLinkText "Cygnus OB2#12".
- Cygnus_OB2-12 wikiPageWikiLinkText "Cygnus OB2-12".
- Cygnus_OB2-12 absmagV "−9.85".
- Cygnus_OB2-12 age "3".
- Cygnus_OB2-12 appmag "11.4".
- Cygnus_OB2-12 appmag "14.41".
- Cygnus_OB2-12 appmag "2.704".
- Cygnus_OB2-12 appmag "3.512".
- Cygnus_OB2-12 appmag "4.667".
- Cygnus_OB2-12 appmag1Passband "B".
- Cygnus_OB2-12 appmag2Passband "V".
- Cygnus_OB2-12 appmag3Passband "J".
- Cygnus_OB2-12 appmag4Passband "H".
- Cygnus_OB2-12 appmag5Passband "K".
- Cygnus_OB2-12 bV "3.01".
- Cygnus_OB2-12 class "B3-B4Iae".
- Cygnus_OB2-12 constell Cygnus_(constellation).
- Cygnus_OB2-12 distPc "1600".
- Cygnus_OB2-12 epoch "J2000".
- Cygnus_OB2-12 galLat "+00.8301".
- Cygnus_OB2-12 galLon "80.1021".
- Cygnus_OB2-12 hasPhotoCollection Cygnus_OB2-12.
- Cygnus_OB2-12 luminosity "1900000".
- Cygnus_OB2-12 mass "110".
- Cygnus_OB2-12 pError "2.3".
- Cygnus_OB2-12 parallax "0.4".
- Cygnus_OB2-12 propMoDec "−2.94".
- Cygnus_OB2-12 propMoRa "2.62".
- Cygnus_OB2-12 radialV "-11".
- Cygnus_OB2-12 radius "246".
- Cygnus_OB2-12 reason "#".
- Cygnus_OB2-12 temperature "13700".
- Cygnus_OB2-12 title "Cygnus OB2 #12".
- Cygnus_OB2-12 uB "1.69".
- Cygnus_OB2-12 variable Luminous_blue_variable.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Correct_title.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Reflist.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Solar_mass.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_astrometry.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_begin.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_catalog.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_character.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_detail.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_end.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_observe.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Starbox_reference.
- Cygnus_OB2-12 wikiPageUsesTemplate Template:Stars_of_Cygnus.
- Cygnus_OB2-12 subject Category:B-type_hypergiants.
- Cygnus_OB2-12 subject Category:Cygnus_(constellation).
- Cygnus_OB2-12 subject Category:Hipparcos_objects.
- Cygnus_OB2-12 subject Category:Luminous_blue_variables.
- Cygnus_OB2-12 type CelestialBody.
- Cygnus_OB2-12 type Place.
- Cygnus_OB2-12 type Star.
- Cygnus_OB2-12 type Location.
- Cygnus_OB2-12 type Place.
- Cygnus_OB2-12 type Thing.
- Cygnus_OB2-12 comment "Cygnus OB2 #12 is an extremely bright blue hypergiant with an absolute bolometric magnitude (all electromagnetic radiation) of −10.9, among the most luminous stars known in the galaxy. This makes the star nearly two million times more luminous than the Sun, although less than half the estimates when the star was first discovered. It is now known to be a binary, with the companion approximately a tenth as bright.".
- Cygnus_OB2-12 label "Cygnus OB2-12".
- Cygnus_OB2-12 sameAs الدجاجة_أو_بي_2-12.
- Cygnus_OB2-12 sameAs Cygnus_OB2_12.
- Cygnus_OB2-12 sameAs Cyg_OB2-12.
- Cygnus_OB2-12 sameAs Cygnus_OB2_12.
- Cygnus_OB2-12 sameAs ماکیان_اب_۲–۱۲.
- Cygnus_OB2-12 sameAs Cyg_OB2-12.
- Cygnus_OB2-12 sameAs Cygnus_OB2-12.