Declination Sun and timeequation
For sundial design purposes I had a table made by the mainframe computer of my employer. This table gives for every day in the year the mean values of the declination and timeequation measured over the coming century: 2000 - 2099. The values are for 12:00 GMT(noon). I used the original formulas from 'Explanatory supplement to the Astronomical Ephemeris' published by HM Stationery Office in London. You can find it on: http://www.chabot.demon.nl/sundials/SunMeanGMT.htm - Thibaud Taudin-Chabot 52°18'19.85" North 04°51'09.45" East home email: [EMAIL PROTECTED] (attachments max. 500kB; for larger attachments contact me first)
Re: Declination Sun and timeequation
To complement this information I have posted a C language program to calculate the sun/mean sun difference in right ascension as a function of the declination. Data from that program is also given. Please see http://www.wengersundial.com/Analemma/analemmaDetails.html Dan Wenger >For sundial design purposes I had a table made by the mainframe computer of >my employer. > >This table gives for every day in the year the mean values of the >declination and timeequation measured over the coming century: 2000 - 2099. >The values are for 12:00 GMT(noon). > >I used the original formulas from 'Explanatory supplement to the >Astronomical Ephemeris' published by HM Stationery Office in London. > >You can find it on: >http://www.chabot.demon.nl/sundials/SunMeanGMT.htm > > >- >Thibaud Taudin-Chabot >52°18'19.85" North 04°51'09.45" East >home email: [EMAIL PROTECTED] >(attachments max. 500kB; for larger attachments contact me first) Daniel Lee Wenger Santa Cruz, CA [EMAIL PROTECTED] http://wengersundial.com http://wengersundial.com/wengerfamily
Re: Declination Sun and timeequation
Many thanks Thibaud - that should prove to be a great help to all! alexei At 10:07 02/26/2000 , T.& M. Taudin-Chabot wrote: For sundial design purposes I had a table made by the mainframe computer of my employer. This table gives for every day in the year the mean values of the declination and timeequation measured over the coming century: 2000 - 2099. The values are for 12:00 GMT(noon). I used the original formulas from 'Explanatory supplement to the Astronomical Ephemeris' published by HM Stationery Office in London. You can find it on: http://www.chabot.demon.nl/sundials/SunMeanGMT.htm - Thibaud Taudin-Chabot 52°18'19.85" North 04°51'09.45" East home email: [EMAIL PROTECTED] (attachments max. 500kB; for larger attachments contact me first) * "Give people an inch, and they think they're rulers."
