Clavius and Moretus in a Sharp Lunarscape Scene

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Like if we were making an orbital flight over the moon, the image captured on March 23, 2021 from Dark Sky® Alqueva Observatory, in Cumeada village, Portugal, on a very steady night, shows a high-resolution sharp view of Clavius along with Moretus craters framed in the same scene. Being Clavius one of the largest and older formations on the  lunar surface, features a diameter of 230.8Km and a Depth of 3.5 km, and it was formed during the Nectarian period. The convex plain floor was flooded with lava at about 4 billion years ago, it has a low outer wall comparing to its size, marked by some small and large crater impacts, like the detailed Rutherfurd visible in the upper part of the crater wall with a diameter of 47,4km and depth of 2,5km, as well as Porter – lower part of the crater wall near the lower egde of the image – with 51,3km in diameter. Last October 2020, NASA has announced and confirmed the existence of a molecular water near Clavius. But this lunarscape scene also shows another very interesting crater, Moretus – upper right corner – with a diameter of 114km. Due to the location near the lunar limb, the crater appears oblong because of foreshortening. The rim of the crater has a wide, terraced inner wall, and a complex outer rampart. The floor has been partly resurfaced and is relatively flat. In the middle is a central mountain formation that rises about 2.1 kilometers above the surrounding floor.

PT: Como se estivéssemos em pleno voo orbital sobre a lua, esta imagem captada a 23 de Março de 2021 a partir do Observatório da Cumeada, no Dark Sky® Alqueva, Portugal, numa noite com a atmosfera muito estável, mostra uma visão nítida em alta resolução da cratera Clavius ​​juntamente com a cratera Moretus enquadradas na mesma cena. Sendo Clavius ​​uma das maiores e mais antigas formações na superfície lunar, apresentando um diâmetro de 230,8 km e uma profundidade de 3,5 km, foi formada durante o período Nectárico, na escala do período geológico lunar. O chão plano e convexo foi inundado com lava há cerca de 4 mil milhões de anos atrás, revelando uma parede externa baixa comparada com o seu tamanho total, marcada por alguns impactos que formaram pequenas e grandes crateras, como a detalhada Rutherfurd visível na parte superior da parede da cratera com um diâmetro de 47,4km e uma profundidade de 2,5km, assim como a Porter – visível na parte inferior da parede da cratera, próxima à parte inferior da imagem – com 51,3km de diâmetro. Em outubro de 2020, a NASA anunciou e confirmou a existência de uma molécula de águra perto de Clavius. Mas esta paisagem lunar também mostra outra cratera muito interessante, Moretus, com um diâmetro de 114 km. Devido à localização próxima ao limbo lunar, a cratera parece oblonga devido à perspectiva. O extremo da cratera tem uma parede interna ampla e em terraço, assim como uma muralha externa complexa. O piso foi parcialmente recapeado e é relativamente plano. No meio está uma formação montanhosa central que se eleva a cerca de 2,1 quilémetros acima do solo circundante.

Technical details | Detalhes Técnicos

Camera ASI174MC | Meade UHTC LX200 12″ GPS|  Barlow 4x Televue Powermate | Sum of 200 frames for each panel. Processing on AutoStakkert 3, Registax 6 and Photoshop CC 2021. Cumeada Observatory from Dark Sky® Alqueva Reserve, Reguengos de Monsaraz.



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