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Silbury Sun Roll.

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tiompan T
tiompan May 8, 2011 12:20:36
Replying to Chris Collyer

Chris Collyer wrote:
There's apparently a sun roll down the slope of Win Hill visible from Hordron Edge circle in Derbyshire that occurs around 11th November and 2nd February. I've never managed to see it myself but it was recorded by John Barnatt in the late 70's.

-Chris

Thanks Chris , just checked and certainly the orienation to Win Hill from the circle would have a sunset around 9th November and 2nd February (close to the minor standstill and worth a mention ) but the angle of the sun set is 33 degrees and the hill slope , apart from the actual summit which would supply a few seconds of "roll", is nothing like that being far too shallow . What is needed is the classic regular tent shaped slope and a lot of it if you are not too close .

C cerrig
cerrig May 8, 2011 18:35:58
Replying to tiompan

George, is there somewhere I could look up regarding this rise/set angle throughout the year. I'm not looking for sun rolls as such, although that would make a good photo, but more a way of getting an idea where the sun would appear/disappear over local horizons. This would be using nothing more than a compass and clinometer(suunto)