Monday, February 04, 2013
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Gemma Frisius (88 km) and Goodacre (46 km), are two craters that are located on the southern hemisphere of the Moon, in an area full of craters of all sizes. Over most craters of this region are passing the bright rays of Tycho crater with an intense albedo, located to the south-west.
Gemma Frisius, compared with Goodacre has a smoother floor, although it is "riddled" by many subsequent small impacts. The edge is affected, also laced by other smaller impacts. Gemma Frisius A (68 km), located in the south-west, is a crater big enough, but so blunt, so if you were there you would not say you are looking at a crater, but on some hills.
Gemma Frisius has a depth of 4.7 km, compared with Goodacre which is 3.2 km deep.
The two are separated by Goodacre's edge, which is entered Gemma Frisius, on the border between the two existing a a smaller impact crater.
Other craters visible in these pictures through the telescope, are each labeled in the image below.
Optics: Celestron C8-Newtonian telescope, 20mm Plössl, 2x barlow
Mount: CG5 (EQ5)
Camera: Sony CX130
Filter: no
Date: 29/04/2012
Location: Baia Mare, Romania
Processing: video capture, FastStone Image Viewer
Posted in: Craters-Gemma Frisius and Goodacre
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