Assertion: hazardous asteroid | /r/CreatedBy | astronomer
Facets:
value: at arecibo observatory
type: LOCATION
value: on 4 january
type: TEMPORAL
Source sentences:
text: The discovery was made by astronomers at Arecibo Observatory on 4 January 2019, while 2016 AZ 8 was passing within 4,460,000 kilometers (0.0298 AU) of the Earth.