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About: DM Geminorum     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:Whole100003553, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingplacedbo:Locationschema:Placecelestial bodyyago:WikicatNovaeyago:WikicatObjectsNamedWithVariableStarDesignationsyago:CelestialBody109239740yago:NaturalObject100019128yago:Nova109374493yago:Object100002684yago:PhysicalEntity100001930yago:WikicatHenryDraperCatalogueObjectsstaryago:Star109444100yago:Whole100003553 New Facet based on Instances of this Class

DM Geminorum also known as Nova Geminorum 1903 was a nova which erupted in the constellation Gemini in 1903. It was discovered by Herbert Hall Turner at the Greenwich Observatory on a Carte du Ciel photographic plate taken on 16 March 1903. Post-discovery examination of earlier photographs of the region taken at the Harvard College Observatory showed that the star was fainter than apparent magnitude 9 on 2 March 1903, and magnitude 5.1 on 6 March 1903, making it visible to the naked eye at that time. It had a conspicuous red color due to strong Hα line emission. By 1 April 1903 it had faded to magnitude 8.5. By 1989 it had reached visual magnitude 17.38.