0.002 seconds exposure, SBIG ST-8E CCD.
18" f/10.5 Ritchey-Chrétien telescope at prime focus.
Situated a little to the east of Copernicus on the Carpathian mountain range, Erathostenes is a 60km diameter crater with interesting terraced walls and a multiple central peak. It is one of my favourite craters, however for most observers, it tends to get overlooked in favour of its larger companion to the west. It usually becomes visible the day before Copernicus. When the sun first rises over it, the crater and the surrounding steep mountains make for a spectacular sight.
