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bn:03285234n
Noun Named Entity
PT
OJ 287
EN
OJ 287 is a BL Lac object 5 billion light-years from Earth that has produced quasi-periodic optical outbursts going back approximately 120 years, as first apparent on photographic plates from 1891. Wikipedia
Relations
Sources
IS A
estrela variável
fonte de rádio astronômica
Objeto BL Lacertae
fonte de raio-X
variável de longo período
CONSTELLATION
Cancer
EPOCH
J2000.0
BabelNet
PT
OJ 287

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