Sat24 showed a three hour gap in the clouds and gave me enough time to explore day 13 of the moon....

The three named craters in this sketch show along the terminator.

The largest crater at the top is Pythagoras, 130km in diameter with steep 5000m cliffs and a double central mountain (although only one showed at the time of the sketch).

Oenopides is next with steep terraced cliffs, 68km at its widest point and suffers the same crushed walls as Pythagoras from the walled plain Babbage in the centre.

Right at the bottom of the sketch is Markov the smallest crater at 41km in diameter and with 2400m cliffs.

Telescope / 4" f/11 Lyra

EP / 3/6mm Nagler zoom at 6mm x183

Temp / 2˚C

Transparency / average

Antoniadi III

Colongitude 65.6˚

Phase 26.6˚

Lunation 12.99 days