The mons Gruithuisen, Gamma and Delta, are occasionally gifted with a
light angle that brings out maximal contrast. Gamma's central crater
shows very well. I must admit some frustration with Delta, though. Quite
a bit of detail is visible, but I'm uncertain of any peak crater. At
times, maybe a hint. I have thought I spied it in the past, but it has
been a while, and doubts creep in...
[ ... ] we made a half-hearted attempt at the central craters of Mons
Gruithuisen Gamma and Delta, but the sky would not support that kind of
tight look. It seemed a good time to give it the old college try, though,
since they were just emerging into day.