Archimedes is a large lunar impact crater on the eastern edges of the Mare Imbrium. Its diameter is 81 km and is the largest of any crater on the Mare Imbrium. The rim has a significant outer rampart brightened with ejecta and the upper portion of a terraced inner wall, but lacks the ray system associated with younger craters. A triangular promontory extends 30 kilometers from the southeast of the rim.
The interior of the crater lacks a central peak, and is flooded with lava. It is devoid of significant raised features, although there are a few tiny meteor craters near the rim. Scattered wisps of bright ray material lie across the floor, most likely deposited by the impact that created Autolycus.
Telescope: Newtonian 200mm f/5 + Meade barlow 2x + red filter
Camera: ASI178MC
Mount: EQ5 Pro Synscan
Software: Sharpcap, ACDSee Pro 2
Frames: best 1500 of 15000 frames
Archimedes is a large lunar impact crater on the eastern edges of the Mare Imbrium. Its diameter is 81 km and is the largest of any crater on the Mare Imbrium. The rim has a significant outer rampart brightened with ejecta and the upper portion of a terraced inner wall, but lacks the ray system associated with younger craters. A triangular promontory extends 30 kilometers from the southeast of the rim.
The interior of the crater lacks a central peak, and is flooded with lava. It is devoid of significant raised features, although there are a few tiny meteor craters near the rim. Scattered wisps of bright ray material lie across the floor, most likely deposited by the impact that created Autolycus.
Telescope: Newtonian 200mm f/5 + Meade barlow 2x + red filter
Camera: ASI178MC
Mount: EQ5 Pro Synscan
Software: Sharpcap, ACDSee Pro 2
Frames: best 1500 of 15000 frames
