Chur is a comet in the Kerbol system.
"Chur is a comet that was discovered by renowned astronomer Churro Kerman, who was actually attempting to track comet Minmus at the time of discovery. After examining the photographic plates he brought home from his lab, Churro Kerman realized that the body he had captured could not in fact be Minmus, and had to be an entirely separate object. Eventually the comet itself, as well as a type of fried-dough snack popular on Kerbin, was named after him for his discovery."
Chur is one of the 3 most well known comets around Kerbol, and also the smallest. Chur's most well-known feature is its two-headed appearance, which scientists have found is a result of a gentle collision between two asteroids.