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- (415029)_2011_UL21 apoapsis "5.247893304156E8".
- (415029)_2011_UL21 mass "2.1".
- (415029)_2011_UL21 orbitalPeriod "1128.6225".
- (415029)_2011_UL21 periapsis "1.1008907304813E8".
- (415029)_2011_UL21 absoluteMagnitude "15.8".
- (415029)_2011_UL21 abstract "(415029) 2011 UL21 (provisionally known as 2011 UL21) is an Apollo class potentially hazardous asteroid (PHA) discovered on October 17, 2011 by the Catalina Sky Survey project. The asteroid is estimated to have a diameter of 2.5 kilometres (1.6 mi). It was rated at Torino Scale 1 on October 27, 2011 with an observation arc of 9.6 days. (415029) 2011 UL21 briefly had about a 1 in a million chance of impacting in 2029. Its cumulative impact probability was dropped to 1 in 71 million by 2 November 2011 with an observation arc of 15 days. It was removed from the Sentry Risk Table on 4 November 2011 when all impact scenarios for the next 100 years or more were ruled out. During 2029, the closest approach to Earth is 1.6AU. Palomar Observatory precovery images from 1989 and 1990 have extended the observation arc to 22 years. Its next notable close approach to the Earth will be on June 27, 2024 at a distance of 0.044 AU (6,600,000 km; 4,100,000 mi).With an absolute magnitude (H) of 15.8, it is potentially the largest/brightest potentially hazardous asteroid detected since (242450) 2004 QY2. The next largest PHA (based on absolute magnitude) discovered in 2011 is 2011 WO41 with an absolute magnitude of 16.8.".
- (415029)_2011_UL21 apoapsis "5.247893304156E11".
- (415029)_2011_UL21 discovered "2011-10-17".
- (415029)_2011_UL21 discoverer Catalina_Sky_Survey.
- (415029)_2011_UL21 epoch "(Uncertainty=0)".
- (415029)_2011_UL21 epoch "2012-Mar-14".
- (415029)_2011_UL21 mass "2100.0".
- (415029)_2011_UL21 orbitalPeriod "9.751298399999999E7".
- (415029)_2011_UL21 periapsis "1.1008907304813E11".
- (415029)_2011_UL21 wikiPageID "49068370".
- (415029)_2011_UL21 wikiPageLength "5941".
- (415029)_2011_UL21 wikiPageOutDegree "24".
- (415029)_2011_UL21 wikiPageRevisionID "707817324".
- (415029)_2011_UL21 wikiPageWikiLink Absolute_magnitude.
- (415029)_2011_UL21 wikiPageWikiLink Asteroid.
- (415029)_2011_UL21 wikiPageWikiLink Astronomical_unit.
- (415029)_2011_UL21 wikiPageWikiLink Catalina_Sky_Survey.
- (415029)_2011_UL21 wikiPageWikiLink Category:Apollo_asteroids.
- (415029)_2011_UL21 wikiPageWikiLink Category:Astronomical_objects_discovered_in_2011.
- (415029)_2011_UL21 wikiPageWikiLink Category:Discoveries_by_CSS.
- (415029)_2011_UL21 wikiPageWikiLink Category:Numbered_asteroids.
- (415029)_2011_UL21 wikiPageWikiLink Category:Potentially_hazardous_asteroids.
- (415029)_2011_UL21 wikiPageWikiLink Category:Removed_from_Sentry_Risk_Table.
- (415029)_2011_UL21 wikiPageWikiLink Degree_(angle).
- (415029)_2011_UL21 wikiPageWikiLink Julian_year_(astronomy).
- (415029)_2011_UL21 wikiPageWikiLink List_of_Apollo_asteroids.
- (415029)_2011_UL21 wikiPageWikiLink List_of_observatory_codes.
- (415029)_2011_UL21 wikiPageWikiLink Near-Earth_object.
- (415029)_2011_UL21 wikiPageWikiLink Palomar_Observatory.
- (415029)_2011_UL21 wikiPageWikiLink Potentially_hazardous_object.
- (415029)_2011_UL21 wikiPageWikiLink Precovery.
- (415029)_2011_UL21 wikiPageWikiLink Sentry_(monitoring_system).
- (415029)_2011_UL21 wikiPageWikiLink Torino_scale.
- (415029)_2011_UL21 wikiPageWikiLink Uncertainty_parameter.
- (415029)_2011_UL21 wikiPageWikiLinkText "(415029) 2011 UL21".
- (415029)_2011_UL21 wikiPageWikiLinkText "415029".
- (415029)_2011_UL21 absMagnitude "15.8".
- (415029)_2011_UL21 aphelion "3.508".
- (415029)_2011_UL21 argPeri "284.7".
- (415029)_2011_UL21 ascNode "275.6".
- (415029)_2011_UL21 bgcolour "#FFFFC0".
- (415029)_2011_UL21 dimensions "~2500 meters".
- (415029)_2011_UL21 discovered "2011-10-17".
- (415029)_2011_UL21 discoverer Catalina_Sky_Survey.
- (415029)_2011_UL21 discoverer "0.68".
- (415029)_2011_UL21 discovery "yes".
- (415029)_2011_UL21 eccentricity "0.6532".
- (415029)_2011_UL21 epoch "2012".
- (415029)_2011_UL21 inclination "34.84".
- (415029)_2011_UL21 mass "2.1".
- (415029)_2011_UL21 meanAnomaly "23.77".
- (415029)_2011_UL21 mpCategory List_of_Apollo_asteroids.
- (415029)_2011_UL21 mpCategory Near-Earth_object.
- (415029)_2011_UL21 mpCategory Potentially_hazardous_object.
- (415029)_2011_UL21 perihelion "0.7359".
- (415029)_2011_UL21 period "9.751298399999999E7".
- (415029)_2011_UL21 physicalCharacteristics "yes".
- (415029)_2011_UL21 semimajor "2.122".
- (415029)_2011_UL21 width "25".
- (415029)_2011_UL21 wikiPageUsesTemplate Template:Convert.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:E.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:Infobox_planet.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:JPL_small_body.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:Mp.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:Mpl.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:Reflist.
- (415029)_2011_UL21 wikiPageUsesTemplate Template:Small_Solar_System_bodies.
- (415029)_2011_UL21 subject Category:Apollo_asteroids.
- (415029)_2011_UL21 subject Category:Astronomical_objects_discovered_in_2011.
- (415029)_2011_UL21 subject Category:Discoveries_by_CSS.
- (415029)_2011_UL21 subject Category:Numbered_asteroids.
- (415029)_2011_UL21 subject Category:Potentially_hazardous_asteroids.
- (415029)_2011_UL21 subject Category:Removed_from_Sentry_Risk_Table.
- (415029)_2011_UL21 hypernym Class.
- (415029)_2011_UL21 type CelestialBody.
- (415029)_2011_UL21 type Event.
- (415029)_2011_UL21 type Place.
- (415029)_2011_UL21 type Planet.
- (415029)_2011_UL21 type Event.
- (415029)_2011_UL21 type Location.
- (415029)_2011_UL21 type Place.
- (415029)_2011_UL21 type Thing.
- (415029)_2011_UL21 type Q634.
- (415029)_2011_UL21 comment "(415029) 2011 UL21 (provisionally known as 2011 UL21) is an Apollo class potentially hazardous asteroid (PHA) discovered on October 17, 2011 by the Catalina Sky Survey project. The asteroid is estimated to have a diameter of 2.5 kilometres (1.6 mi). It was rated at Torino Scale 1 on October 27, 2011 with an observation arc of 9.6 days. (415029) 2011 UL21 briefly had about a 1 in a million chance of impacting in 2029.".
- (415029)_2011_UL21 label "(415029) 2011 UL21".
- (415029)_2011_UL21 sameAs Q4622750.
- (415029)_2011_UL21 sameAs (415029)_2011_UL21.
- (415029)_2011_UL21 sameAs 2011_UL21.
- (415029)_2011_UL21 sameAs (415029)_2011_UL21.
- (415029)_2011_UL21 sameAs m.0hgn19m.
- (415029)_2011_UL21 sameAs Q4622750.
- (415029)_2011_UL21 wasDerivedFrom (415029)_2011_UL21?oldid=707817324.
- (415029)_2011_UL21 isPrimaryTopicOf (415029)_2011_UL21.