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Any astronomers around?
06-07-2014, 01:33 PM
Post: #12
RE: Any astronomers around?
(06-05-2014 01:09 PM)HP67 Wrote:  I'm not interested in astronomy generally, I just need a few formulas.

If anybody can help figuring x degrees after sunset or point me to a section of the book, etc. that would be great. Thank you.

Update: apparently changing the zenith value to reflect the degrees before or after the event works. There must be a way to calculate this after the fact, I'll look into that.

Back in the old days (before GPS) we used to accurately set our 41C clock, scale our LAT/LONG from a USGS topo map, then we would use a solar filter to measure the angle from our backsight point to the sun direct and reverse. The calculator would be used as a stopwatch and take the horizontal angle and the exact time and the LAT / LONG and calculate the azimuth of our backsight line.

an old ephemeris is here: http://www.rollanet.org/~eksi/2008EPHEM.pdf

the ephemeris has HP programs! I know I may be over thinking your problem but also thought readers here might be interested in this.

Thanks
~~~~8< Art >8~~~~

PS: Please post more 50G stuff :)
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Messages In This Thread
Any astronomers around? - HP67 - 05-29-2014, 05:17 PM
RE: Any astronomers around? - Dale Reed - 05-30-2014, 04:03 PM
RE: Any astronomers around? - everettr - 05-30-2014, 06:08 PM
RE: Any astronomers around? - HP67 - 05-31-2014, 06:41 PM
RE: Any astronomers around? - HP67 - 06-01-2014, 11:37 AM
RE: Any astronomers around? - NetMage - 06-02-2014, 07:11 AM
RE: Any astronomers around? - HP67 - 06-02-2014, 09:44 AM
RE: Any astronomers around? - HP67 - 06-04-2014, 06:40 PM
RE: Any astronomers around? - htom trites - 06-04-2014, 09:01 PM
RE: Any astronomers around? - HP67 - 06-05-2014, 01:09 PM
RE: Any astronomers around? - CosmicTruth - 06-07-2014 01:33 PM



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