Visibility IV / V
The attempt to draw Atlas and Hercules in the evening light, perhaps too early in the evening, the shadows were short. The weather was good, and the Moon was high, so the rills of Atlas stood out every now and then. The Atlas is an early-crimean crater, with a thick throwing mantle (Glacis) around it, except in the northwest, where Glacis sinks in the direction of Atlas E. Teemu Öhman recalled that TG Elger (1838-1897) launched the word Glacis defining: outer slope of a ring-plain. Hercules is eratosthenes, about 68 km in diameter. In the sonar images, Hercules E stands out as oval because it has hit exactly on the edge wall.