Calculating Sunrises

[Snipes]

Ok guys you will have to bare with me. I am going to state what I know ad its very little. So if I confuse a few topics please don't flame too hard!

If I wanted to calculate sunrises without observational data (I know I could do it the hard way and mark each day or certain days based on observation) how would I do it. I am in northern hemisphere and can provide coordinates if necessary. The sun rises due east on the equinoxes correct? How would I calculate other times such as the solstice? I am also doing this for modern day as I know I would have to account for declination (?) for other time periods.

Any help? Sorry for rambling

 

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[empty_pockets]

Try the Old Farmers Almanac on line...Excellent ways to do so...

 

[Snipes]

I should add I am looking to calculate the point on the horizon it rises. It wasn't clear initially.

 

[BosnMate]

Ha, you are on to something. If I tell you, what's my share? Just kidding, I haven't got the foggiest idea how to do that.

 

[DDancer]

One way is to just make a reference point, dig a hole and set up a post, put a round disk on it with a stick in the middle like a sun dial and make a mark everyday for the next year at sunrise and sunset. Its a neat experiment. However you said without observational data sooo....

You can go to this link..... SunCalc - sun position, sunlight phases, sunrise, sunset, dusk and dawn times calculator

Other wise you need to know your exact coordinates, a little calculus, and you might as well study some physics. Look around online theres a ton of info and maybe the stuff you want that will work for you.
Luck with it.

 

[Snipes]

I have run across some complicated ways to do it as you mentioned. I feel like its like everything else and theres a very practical way to do it too. The real question is whether the practical way is via observational data. I'm willing to bet its like alot of old time navigation methods... if you knew a few tricks you could do it reasonably easy but without them we are left with calculus!

 

[Snipes]

Also, so far that site looks great. Only gave it an initial look over but the basics is defianetly there. Wondering how easy I can adapt it to the actual landscape

 

[Alan Applegate]

It sure doesn't hurt if you have a few college classes about celestial mechanics under your belt. And then, of course, you have to adjust the timing to your Lat and Lon. Don't you just love calculus?

 

[Boatlode]

Ok guys you will have to bare with me. I am going to state what I know ad its very little. So if I confuse a few topics please don't flame too hard!

If I wanted to calculate sunrises without observational data (I know I could do it the hard way and mark each day or certain days based on observation) how would I do it. I am in northern hemisphere and can provide coordinates if necessary. The sun rises due east on the equinoxes correct? How would I calculate other times such as the solstice? I am also doing this for modern day as I know I would have to account for declination (?) for other time periods.

Any help? Sorry for rambling

May I be nosey and ask why is this necessary? Are you looking for a lost gold mine where the old indian told you the sun shines on the vein for 1 minute exactly at sunrise on July 23?