Blancanus Craterlet Resolution Examples
Examples... Crater Resolution...
The craterlets on the floor of Blancanus (Rükl 72) are suitable targets for testing the resolution limit of Earth-based telescopes.
At the top is a small detail from a photo taken by Italian amateur Carmelo Zannelli on 2008 Nov 8 at 21:20 UT using a homemade 412 mm aperture Newtonian reflector @ F/20 with a Lumenera Infinity 2-1M camera and Baader Red Filter with IR-Cut.
At the bottom is an image from Lunar Orbiter IV remapped to the same scale and libration. A typical 1-km diameter craterlet is labeled. This appears to be about the resolution limit of the Earth-based photo. It does not seem to be reliably showing craterlets smaller than this, and some larger ones are ambiguous.
Click on the images to open them in separate browser Tabs or Windows. You can then blink between them.
This page has been edited 1 times. The last modification was made by - 
JimMosher on Nov 23, 2008 8:46 am