The tail of the Scheila asteroid was due to a probable collision event

In 2010, the Scheila asteroid showed like a comet, with a well defined tail that disappeared in a few days. IAA astronomers analyzed the event and attributed to a probable collision event
Image comet Sheila
21/09/2011

asteroide Scheila

Imágenes del cometa Sheila

Reference: 

F. Moreno et al. (596) Scheila in outburst: a probable collision event in the main asteroid belt. The Astrophysical Journal, 738:130. DOI: 10.1088/0004-637X/738/2/130

More info: 

Fernando Moreno, fernando[at]iaa.es 622233836

Press release: 
PDF icon Press release about Sheila comet