Crater Posidonius and the nearby rimae

Location of photo
Dumitrana, Romania
Date/Time of photo
November 18, 2016
355mm F/4.5 Newtonian, 2x and 3x barlows, ASI 174MM with red filter. Seeing 9/10.
Crater Posidonius in near perfect seeing conditions. This fantastic looking area has a panoply of rilles, starting with the very sinous one on the floor of Posidonius. The actual shape of the rille is only detectable in very good conditions and with larger aperture telescopes. The full resolution image is at the moment one of the best, in terms of resolution, acquired by amateurs using amateur equipment. Craters of around 450-500 meters are detectable in the full res image:
All comments must follow the Sky & Telescope Terms of Use and will be moderated prior to posting. Please be civil in your comments. Sky & Telescope reserves the right to use the comments we receive, in whole or in part, and to use the commenter’s username, in any medium. See also the Terms of Use and Privacy Policy.


This site uses Akismet to reduce spam. Learn how your comment data is processed.