QUESTION: Will the probe go anywhere near the famed "Big Red Spot"? ANSWER from Eilene Theilig on January 13, 1995: This was an interesting question and I had to consult with one of our atmospheric scientists to find out the location of the Great Red Spot when we arrived at Jupiter. The Great Red Spot is constrained to a limited latitude band in the southern hemisphere but migrates in longitude. At the time of the probe entry, it was 90 degrees away in longitude and 29 degrees away in latitude from the probe site. The entry site was carefully selected to meet requirements on the probe design and on the orbiter trajectory. The latitude of the probe entry site (6.55 degrees N) was chosen to minimize the difference between the probe's speed and the speed at which the atmosphere rotates. Outside of the equatorial region the relative impact speed increases and the probe might not have survived long enough to complete its observations. The time of arrival at Jupiter, which determined the longitude (4.39 degrees W ), was exactly timed so that the orbiter would fly over the probe as it entered the atmosphere. The orbiter trajectory was also constrained to fly by Io at a specified altitude to get the gravity assist required to go into orbit.