[1] The smaller but prominent crater Cavalerius is joined to the northern rim by low ridges.

The flat floor of the crater has been flooded by lava, and is now cross-crossed by a system of small clefts named the Rimae Hevelius.

The northeastern part of the interior is more irregular and contains a straight ridge running toward the southeast.

[3] This feature is sometimes referred to as Hevel, the astronomer's name in German (Hevelius is a Latinized form).

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Hevelius.