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Old 20-06-2020, 04:45 AM
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Venus occultation on other side of the world

This morning (Europe) Venus was occulted by the Moon in the morning, the first one in my life I really saw, earlier events were clouded out.
It was not visible from Australia.

The Moon was barely visible, Venus was easy. Apart from a few cirrus clouds, it was nice and clear. The entry I took with my Canon 6D behind my 110 ED refractor f/7 in prime focus and cropped the shots in half.

Not all shots succeeded, so I decided to film the exit with my Sony RX100M6 behind the eyepiece (second part of the video below). That is rather shaky due to the handheld nature.


Here a video.

https://www.skysurfer.eu/jwplayer/vi...kubXA0Ojo6NjAw
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Old 20-06-2020, 06:43 AM
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multiweb (Marc)
ze frogginator

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Nice catch. Couple of mates in Belgium sent me some pics. B4stards It was clear blue sky and reasonably high too.
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Old 20-06-2020, 08:55 AM
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Tinderboxsky (Steve)
I can see clearly now ...

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Fabulous result. I enjoy chasing these transient events.
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Old 20-06-2020, 09:43 AM
Quopaz (Nick)
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Nice one!
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Old 20-06-2020, 12:47 PM
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Retrograde (Pete)
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Cool catch. Interesting that Venus is so much brighter than the limb of the Moon.
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Old 22-06-2020, 08:46 AM
SpaceTas (Stefan)
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Venus "brighter" than Moon

Venus is far more reflective than the Moon. The albedo (fraction light reflected) of Venus is 0.65 while the average is 0.12 for the Moon. The albedo for the Moon is even less at low phases angles because there are more shadows. This means the brightness per unit area (angular area on sky as well) is much higher for Venus. So Venus is easier to see when magnified and against a bright background.
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Old 22-06-2020, 10:17 AM
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Retrograde (Pete)
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Quote:
Originally Posted by SpaceTas View Post
Venus is far more reflective than the Moon. The albedo (fraction light reflected) of Venus is 0.65 while the average is 0.12 for the Moon. The albedo for the Moon is even less at low phases angles because there are more shadows. This means the brightness per unit area (angular area on sky as well) is much higher for Venus. So Venus is easier to see when magnified and against a bright background.
Yes understand the albedo difference is large but I thought the massive difference in distance between the two (and the inverse square law) would more than compensate.
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