• Don SpainEmail author
Part of the Astronomer's Pocket Field Guide book series (ASTROPOC)


Archimedes (50 miles) is a great classic crater. Even 2.4 inches of aperture will give pleasurable views. This fine circular structure has a flat floor that has been flooded with lava. The walls are terraced and rise to a little over a mile above the floor. This beautiful formation is a nice showpiece for any public observation at first quarter. At a magnification of 240 it is very impressive in my 6 inch refractor. No craters or hills are visible on the floor. When the sun is just rising over the eastern ramparts you will see several long shadows cast over the floor.

Bancroft (8 miles) is a sharp crater to the southwest of Archimedes. It is just under a 1½ mile deep and I see no detail on its small floor.

Beer (6 miles) and Feuillee (6 miles) are two almost identical craters. Beer is just a little shallower with both being about 1 mile deep. They make a very attractive pair. Because of there similarity maybe they should have been named Castor and Pollux, the Gemini twins.

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Louisville Astronomical SocietyLouisvilleUSA

Personalised recommendations