Tuesday, June 12, 2012

Bright white venusian crescent

On May 10th, before the popular Venus transit of June 5th, the rather low altitude of Venus hampered any proper imaging of its planetary features.

The image stack above using an IR filter (742nm) shows an illuminated disk representing only a small part of the planet, around 10% visible. No cloud irregularities were observed on the illuminated part except for the lovely graded shading at the edge of the terminator. The latter was observed to be geometrically regular. The dark part of the disk was not visible in contrast to the flaming white crescent.

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