METEO AND SEEING FORECASTS
Thanks to low illumination angles you can easily see the well known system of rilles (a delicious eyepiece sight!), the smallest of which have a width around 600 meters, comparable to Vallis Alpes central rima. Good, despite not exceptional, seeing conditions. CFF 12" f/20 Classical Cassegrain ASI178MM Astronomik G filter
A classic lunar trio: Ptolemaeus, Alphonsus and Arzachel, from North to South (left to right). In this case it is actually a quintet as you can see also Herschel, on the norhern edge, and Alpetragius. Herschel is the youngest of the five, followed by Arzachel, while Ptolomaeus is the older (its formation being estimated around 4 billions of years ago). Note the chains of craterlets on the east and west of Ptolemaeus, and the dark spots inside Alphonsus. CFF 30 cm Classical Cassegrain ASI178MM Astronomik R filter
Sirsalis area, just west of the much more famous Gassendi crater, is extremely interesting. First of all, it contains the longest rille of the Moon, named Rima Sirsalis, which spans some 425 kilometers, visible here almost entirely. Rima Sirsalis cuts in two de Vico A crater, one of the 19 (!) satellites of de Vico main crater and actually bigger than him. On the upper part of the Rima Sirsalis, you can see the other remarkable Rima Darwin, composed by 4 parallel rilles which encounter the former at an angle of approximately ninety degrees. Last, Crüger crater, flooded with young lava, is noticeable for its low albedo and circular shape. Classical Cassegrain CFF 30 cm ASI 178MM camera Astronomik G filter ADC Pierro Astro
