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© 1984-2019 Dave Wilson
All Rights Reserved

18
Jun
2013

Moonset and Penumbra at Dead Horse Point




This view from Dead Horse Point State Park near Moab in Utah was taken just before sunrise and shows, in addition to the moon setting, the penumbra. That dark line just above the horizon is actually the Earth’s shadow cast on the atmosphere. As the sun rises below the horizon, the penumbra recedes until, at sunrise, it disappears below the horizon. You see the same effect at sunset only then, the penumbra rises from the horizon after the sun has set. Take a look to the east next time you are out just after sunset and you’ll probably see it.



Tagged - canyon, Dead Horse Point, Moab, moonset, NXNW, penumbra, river, shadow, state park, sunrise, UT, Utah


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3 Comments

Michael Criswell
June 18, 2013, 1:38 pm

Lovely Dave, I just needed a bit more lens for the moon, maybe a 2 or 3X multiplier for the 70-200
Michael Criswell´s last post ..Old Money

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Evan Gearing
June 18, 2013, 9:26 pm

Very cool, Dave! Never knew what penumbra was! Awesome!
Evan Gearing´s last post ..Clouds Over Minneapolis

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Dave Wilson
June 19, 2013, 10:10 am

Thanks, guys. I shot this at 50mm but, had the moon been lower, I would likely have gone longer to make it bigger. I guess I could have cheated and shot the moon at 400mm then merged it into the shot 🙂

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