Crescents in July 2010

Version 10. July 2010, Martin Elsaesser

Old crescent in daytime on 10. July

I could not find the energy to observe the simple crescent during morning twilight, so i had to resort to daytime observation again. The crescent, still at 20 elongation from the sun, could easily be seen with a small telescope in the blue skies. A red filter somewhat improved contrast for visual observation.

Imaging the crescent was also easy with a small telescope, with a deep-red filter and a good monochrome camera. By stacking hundreds of images, even the earthshine could be faintly detected.

Daytime crescent on 10. July
Old crescent moon at 20 elongation, captured 4.5h AFTER sunrise.


back to start page