Vandelinus is the least distinctive of the Gang
of Four. It's old and smeared, and partially wrecked by Lame
encroaching on its northeast side. There is little detail beyond a minor
wrinkle ridge and a smooth floor with a few craters, mostly melted by
the same "stuff" that fills it.
Hecatius (David North <d _at_ timocharis.com>)
On maps, Hecatius looks quite complex and interesting, but even in good
light the features are so close together that it merely looks broken up
and fragmented, and so ends up being less interesting "in person" than
"in theory." I suspect from its construction that it would look a bit
better lit from the other side, but this is only possible just after
new, and low in the sky when seeing would be very poor, so maybe this is
an object with greater academic than aesthetic interest.
Humboldt (David North <d _at_ timocharis.com>)
Humboldt is big, complicated, and shows very, very well. The interior
peak is really a range ... I could make out four major peaks even at 30x
in lousy seeing, and have suspicions of quite a few more. The central
range stretches, it seems, at least half the diameter of the crater --
which is easily bigger than nearby Petavius. There are also some
craterlets and shadings to add to the flavor, and some fracturing or
mass wasting from the walls to make the rim construction even more
fascinating. Humboldt is a great target for librations that expose the
eastern limb like this.