Venus -31h
Taken by Lorenzo Comolli on June 4, 2012 @
Tradate (VA), Italy
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Camera Used: Unavailable Unavailable
Exposure Time: Unavailable
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Date Taken: 2012:06:04 22:08:32
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Details:
While preparing the Venus Transit of 6 June 2012, Ive imaged the planet Venus while approaching the Sun. This one is at 2°17 from the Sun center, and it was very difficult to obtain due to the extreme proximity of the Sun limb. Extreme care was due to avoid the Sun light entering the telescope.
Ive observed from my observatory in the backyard of my home, in the city center of Tradate (VA), Italy. Observing conditions were very far from ideal: the seeing was very bad and transparency even worse due to continuous transiting of clouds.
The cusp extension was remarkable on June 4, while nearly invisible on June 2. Being the elongation of the two observations nearly one the double of the other, maybe a minimum angle for the cusp extension observation can be found between 3° and 4°.
Another very interesting observation is the limb brightening in the Southern hemisphere between 50° to 70° latitude. For confirmation, Ive another image, obtained with a W25 filter (red), that shows the presence of the brightening in the same way.
Tech data inside the image.
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