Sunrise/SunsetAccessed with Right click on map, Physical geography
Geography options control the behaviour.
- Short table calculates sunrise/sunset
- Long table adds civil/nautical/ astronomical twilight
- Graphical plot shows sunrise, sunset, and the length of daylight at desired position throughout the year.
If you pick the icon with no map active:
Algorithm from pages B5-B7, Almanac for computers 1989, Nautical Almanac Office, U.S. Naval Observatory. Valid for latitudes less than 65° (deteriorates near poles when sun above or below horizon longer than 24 hours) at any time in the latter half of the 20th century. Accurate ± 2 min.
Note that these times give a best guess estimate for the difference to UTC.
Last revision 4/12/2019