Original: Themisto was first discovered by Charles T. Kowal and Elizabeth Roemer on September 30 , 1975 , reported on October 3 , 1975 , IAUC 2845 : Probable New Satellite of Jupiter 1975 October 3 ( discovery ) and designated .
Simplified: Themisto was first found by Charles T. Kowal and Elizabeth Roemer on September 30 , 1975 , reported on October 3 , 1975IAUC 1975 October 3 ( discovery ) and designated .