Why is elongation going from 0 to 360?
A. The Moon moves in a circle. A circle has 360 degrees in it. Thus, the Moon can only go from 0 to 360 degrees. 8. Why is my Moon observation changing so quickly? I took an observation at 4:30 PM two days ago and got an elongation of 230 degrees. I took another observation at 4:30 PM yesterday and got an elongation of 242 degrees. Then I took another observation today at 4:30 PM and got an elongation of 254 degrees. What gives? A. There is a pattern to how the Moon moves around the Earth. If your data is good, you will soon know what that pattern is.