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Need help on sun location/time of year

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Need help on sun location/time of year

Unread postby frankthetank » Tue 21 Aug 2007, 16:05:29

OK.

I have a spot that is sunny during the summer months, but shaded during the winter months. It is near the house, north side (west). I was wondering if this makes sense.

Would the location of the sun be the same today as it would April 21st? (2 months from June 20 ahead and behind?)??? I'm trying to figure a spot for putting some trees but i need to know if the sun will be hitting a given spot during that time or will it still be shaded.

Or am i way off base? I should probably just put a stick in the ground @ Noon today and compare it to what it looks like @ noon on April 21st?

Thanks for any insight.
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Re: Need help on sun location/time of year

Unread postby gnm » Tue 21 Aug 2007, 16:35:37

Frank that is roughly correct but you would need to calculate the position based off the summer (~Jun 21) and winter solstice (~Dec 21) and the equinoxes to figure out when you begin to lose light there.

Good wikipedia article

Hope that helps!

-G
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Re: Need help on sun location/time of year

Unread postby frankthetank » Tue 21 Aug 2007, 19:31:08

I figured it would be close. I won't be planting until April anyways, so i will know by then. I'll just make sure i know where it will be in Sept/etc depending i what i put in there. I want to see if it will help keep 2 Apricots/2 sweet cherries from coming out of dormancy too early.

I looked @ the WiKI article...i was never good with astronomy.
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Re: Need help on sun location/time of year

Unread postby jeezlouise » Wed 22 Aug 2007, 02:44:30

Try this:

Solar site survey

Follow the steps and you can figure out how much sun any given spot on your property will get at any given time of the year. It's really written for solar collectors but should be fine for what you want. Hope that helps. (It only seems complicated until you actually do it.)
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Re: Need help on sun location/time of year

Unread postby Laughs_Last » Wed 22 Aug 2007, 22:36:14

I think Aug 21 is nearly equal to April 10 or so. Close enough? Count the number of days back to the Equinox (June 21). Count an equal number of days farther back to arrive at the equal date.

(As a note of caution, I cannot count.)
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