While watching , they saw two dips in the star 's apparent brightness just before and after the occultation .
The rings were discovered when astronomers observed Chariklo passing in front of the star UCAC4 248 - 108672 on June 3 , 2013 from seven locations in South America .
While watching , astronomers saw two dips in the star 's apparent brightness just before and after the occultation .
The rings were discovered when astronomers observed Chariklo passing in front of the star UCAC4 248 - 108672 on June 3 , 2013 from seven locations in South America .