Wednesday, August 24, 2011
Unknown
Photographer: Victor Lupu
Optics: Celestron C8-Newtonian telescope, plossl 20mm, 2x Barlow
Mount: CG5 (EQ5)
Device: Sony CX105 to 10x, 8x and 5x optical zoom
Total magnitude: 1000x, 800x and 500x (last photo)
Focal diameter: 1 "25
Filter: No
Date: 11/05/2011
Location: Baia Mare, Romania
Processing: Sony Vegas 10 video captures
These materials are craters from the center of the Moon seen from Earth. Ptolemaeus crater (153 km) unlike the others has no central peak, but is an extensive plateau of lava. Arzachel (97 km) has the highest peak in comparison with Alphonsus (108 km). These craters are located at the eastern edge of the Mare Nubium.
About Alpetragius crater (40 km), I have not talked about at all.It lies near the crater Alphonsus and is notable in this huge central peak compared to the size of the crater. The peak is rounded and occupies almost the entire crater floor (a third of the crater floor), and rises
at a height of 2.0 km. There is evidence that this peak was extended through volcanic eruptions, and seems to provide an eroded vent. Alpetragius's depth is 3.9 km.
Crater name comes from Nur ad-Din al-Bitruji (also written Nur al-Din Ibn Ishaq Al-Betrugi and Abu Ishâk ibn al-Bitrogi , who was an astronomer of Andalusia.
Posted in: Craters,Craters of the center,Craters-Ptolemaeus Alphonsus and Alpetragius
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