ephemerides on asteroidal occultations


please refer to the European Asteroidal Occultation Network, Euraster website


ephemerides for planets, dwarf planets, TNOs occultations


please refer to the  Telescop Data Center ephemerides (Smithsonian Astrophysical Observatory)

ephemerides on satellites mutual events


please refer to the Institut de Mécanique Céleste et de Calcul des Ephémérides (IMCCE), IMCCE Phemu09 website

another source, USNO Astronomical Almanac Online (Jupiter)