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


Messala (75 miles wide) is a very large formation. The walls are not particularly high for a crater this size; they are highest on the southwest rim and may reach about 2 miles above the floor. The large flat floor is rather rough with small hills, ridges, and craterlets. There is a series of small central peaks that are off-center. There are three noticeable craters on the rim; the most prominent is on the southern edge. Observe this fine crater around the third day after the new Moon. If seeing conditions are good, observe at a magnification of 240. You will see a wealth of detail.

Hooke (22 miles wide) is a crater a little north and west of Messala. The floor is flat, and even at high magnifications it is difficult to see any detail with a 6-inch refractor.

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Louisville Astronomical SocietyLouisvilleUSA

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