Aristoteles: diameter 87 Km and depth 3.3 Km.
Eudoxus: diameter 67 Km and depth 3.4 Km.
(Source Wikipedia)
Telescope reflector aperture 114mm (4.5"), focal length 900mm, eyepiece (1.25") 13mm and Barlow 2X.
Date: Feb 14, 2016. Hour: 19:33 (00:03 UTC).