{ Practical astronomy | Astronomy | The Moon
  | The physical Moon | The Lunar 100 }

Lunar #93: Dionysius rays

Dionysius is a crater of 18 km diameter near Sabine and Ritter on the shores of Mare Tranquillitatis. This is in the Lunar 100 for the rays of ejecta surrounding the perimeter. Wood in his notes mentions black ejecta rays at the 10, 2 and 5 o' clock directions (Hardwick 2013a), but it may appear more like bright rays pointing broadly east and west.

Image:

1. The area on 2023-02-28, stacked from 700 video frames taken with a Schmidt-Cassegrain reflector of D = 200 mm and f = 3500 mm and Canon EOS 600Dα camera. Wavelet sharpening. The phase was +64%.
2. Dto., annotated and with scale.