It was found by Matthew J. Holman , John J. Kavelaars , Dan Milisavljevic , and Brett J. Gladman on August 13 , 2001 and given the designation S\/2001 U 2 . It was discovered by Matthew J. Holman , John J. Kavelaars , Dan Milisavljevic , and Brett J. Gladman on August 13 , 2001 , and given the provisional designation S\/2001 U 2 .