Fig.2a - The moon on April 23, 2021, taken with an ASI 290MC camera, an APM comacorrecting 2.7x barlow lens and an 8-inch f/5 Teleskop-Service ONTC
Newtonian telescope riding on an equatorial platform (for an annotated version of this image see below). The image can be seen in full resolution
here.
Fig.2b - Annotated image from above.
