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Vincenzo Mirabella

Location of Photo:

Ardea (RM) - ITALY

Date/Time of photo:

2024-02-17 18:40UT


Sky-Watcher Newton 406mm GoTo


In this lunar mosaic, the protagonists are three famous craters. Ptolemaeus, the largest crater visible above, has a diameter of approximately 153 km and its interior is made up of a vast plain characterized by numerous small craters. Alphonsus in the center, has a diameter of 119 km, has a flat surface crossed by a ridge of hills and has a small central peak. It is interesting to note how the Rima Alphonsus, the fissure visible on the east side, is "interrupted" by the long shadows projected by the walls of the eastern edge of the crater. The last of the trio is the Arzachel crater, it has a diameter of 97 km and has walls up to 4500m high. The mountain inside is 1500m high and is displaced towards the west compared to the center of the crater. Thanks to the grazing lighting conditions, craters 500-600 meters in diameter are visible in the original image! The mosaic is composed of 12 panels obtained with ZWO ASI 290MM and Astronomik G filter. To make the image more interesting, I added RGB data from a "Mineral Moon" color image produced in 2023 with a 200mm Newtonian camera Uranus-c. The colors of the selenic surface are due to the different chemical and mineralogical composition of the lunar soil. Date: 2024-02-17 Telescope: Sky-Watcher Newton 406mm GoTo Barlow: TeleVue 3X Camera: ZWO ASI 290MM Filter: Astronomik G ROI: 1936 x 1096 pixel Seeing: 6-7/10 Duration=30s Exposure:4.814ms Gain:305 (50%) Gamma:66 Offset:10 FPS (avg.):169 Frames captured: 5102 Number of frames stacked (20% of total):1020 Observation site: Ardea(RM)-Italy