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.

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