So as a Sailor I have experienced some times where sunset and moonrise are very close together (this happens when it's full moon) which is particularly beautiful. I assumed that this was always the case but looking more closely at time difference between sunset and moonrise they can change quite dramatically.
2019 (Porto-Vecchio France)
Date sunset moonrise diff
04/20 20:08 21:24 1:16
05/19 20:39 21:20 0:41
06/18 20:59 22:05 1:06
07/17 20:54 21:31 0:37
08/16 20:21 21:12 0:51
As you can see there is some degree of variation, can someone explain why this happens and how I can find out where and when they are closest together?