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Friday, 25 November 2011

Balmer and Vendelinus craters-telescope images

Photographer: Victor Lupu
Optics: Celestron C8-Newtonian telescope, plossl 20mm, 2x Barlow
Mount: CG5 (EQ5)
Device: Sony CX105 to 8x optical zoom
Total magnification: 800x
Filter: no
Date: 16/07/2011
Location: Baia Mare, Romania
Processing: FastStone, video capture
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In this eastern region of the Moon there are many important large craters, I have not discussed about and I have not photographed.
           Balmer (112 km) is a lunar crater flooded by lava. Only sections of the south, west and east of the crater survived, the rest being covered by a lava flow that joins the nearby sea. Balmer is east-southeast of the crater Vendelinus.
It was named after Johann Jakob Balmer (May 1, 1825 - March 12, 1898), a mathematician and physicist.

           Vendelinus (147 km), is a large and ancient impact crater at the eastern edge of Mare Fecunditatis, and is a 2.6 km deep crater. On the north of Vendelinus is the  prominent Langrenus, while on the southeast is Petavius , forming a chain of prominent craters on the eastern edge of the sea. Due to its location the crater appears oblong because of its position.

Crater is heavily worn and overlapped by several craters, making it more difficult to identify. Irregular rim is broken in several places overlapped by other craters. The most important of these is a break in the wall of the north-east, by superimposing the crater Lamé  (84 km). Lohse (42 km) overlaps on north-west, and at the south end of the crater is joined with Holden (47 km).

Vendelinus's floor is flat and covered with dark lava flow. It lacks of a central peak, but has several impact craters of different sizes.


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