From a NASA news release (July 1995): "GALILEO TO RELEASE JUPITER ATMOSPHERIC PROBE ... The probe and its payload of scientific instruments will be deployed from the main Galileo spacecraft at 1:30 a.m. EDT July 13 and fly solo the remaining 51 million miles to Jupiter over the next five months. Confirmation of the release will be received 37 minutes later, the time necessary for the radio signal to travel back to Earth at the speed of light."

Contributed by alert reader Jerry McCollom.