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BC Gnomonics

Ephemeris

https://www.gnomoni.ca/sdn/index.htm

Pacific Time: 120º W

Mountain Time: 105º W

Central Time: 90º W

Eastern Time: 75º W

https://www.ngdc.noaa.gov/geomag/calculators/magcalc.shtml

https://www.ncei.noaa.gov/maps/historical-declination/

https://stellarium-web.org/

https://www.sundialzone.com/en/sundial.php?langcode=en/#:~:text=Wall-,declination,-%3A

https://alexboxer.com/astrolabe/

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