Planets are not the only things known to have rings. In 2013 scientists discovered that the 155 mile wide asteroid Chariklo had rings. These rings were discovered as Chariklo occulted a distant star.
Astronomy Fact of the Day: September 8, 2018

Planets are not the only things known to have rings. In 2013 scientists discovered that the 155 mile wide asteroid Chariklo had rings. These rings were discovered as Chariklo occulted a distant star.