Assertion: comet | /r/CapableOf | reach its peak brightness
Facets:
value: on 29 december
type: TEMPORAL
Source sentences:
text: Passing 0.42 au from Earth on 30 November 1680, it sped around an extremely close perihelion of 0.0062 au (930,000 km; 580,000 mi) on 18 December 1680, reaching its peak brightness on 29 December as it swung outward.