Walther Sunset Ray

OCTOBER 16 (Thu) – The brilliant Walther Sunset Ray will occur at 01:12 UT. Located in the ancient 145 kilometer (90 mile) Necterian age crater named Walther (Formerly Walter or Valtherus) is a special treat that occurs monthly for a matter of a few hours. On the western rim of the crater there’s a notch and when the Sun is setting low on the lunar horizon (When the crater is near the terminator) light penetrates the notch, creating a vast triangle or “V” shaped light ray across the craters floor that ends as it illuminates the central peak of the crater. (source http://danspace77.com/2014/10/01/space-junk-october-2014/)

If you have a good view of the Eastern horizon then this is an opportunity to see it from the UK.