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A contour plot of the hours of daylight as a function of latitude and day of the year, using the most accurate models described in this article. It can be seen that the area of constant day and constant night reach up to the polar circles (here labeled "Anta. c." and "Arct. c."), which is a consequence of the earth's inclination.
Day length as a function of latitude and the day of the year. Latitude 40° N (approximately New York City, Madrid and Beijing) is highlighted as an example. A plot of hours of daylight as a function of the date for changing latitudes.
Hours of daylight vs latitude vs day of year: Image title: A contour plot of the hours of daylight as a function of latitude and day of a typical non-leap year, ...
Hours of daylight vs latitude vs day of year: Image title: A contour plot of the hours of daylight as a function of latitude and day of a typical non-leap year, ...
All days of the year, solstices included, have the same length of 12 hours. Solstice day arcs as viewed from 20° latitude. The Sun culminates at 46.56° altitude in winter and 93.44° altitude in summer. In this case an angle larger than 90° means that the culmination takes place at an altitude of 86.56° in the opposite cardinal direction.
The first day of spring is Tuesday, March 19, 2024. It occurs the day of the March equinox, which is set to occur at 11:06 p.m. that night. How many hours of daylight occur on the first day of spring?
The 44th parallel north is a circle of latitude that is 44 degrees north of the Earth's ... the dusk is visible circa 15 hours 29 minutes before the dawn during the ...
For example, at latitude 20° North, on June 21, the sun shines on a north-facing vertical wall for 13 hours, 21 minutes. [33] Vertical sundials which do not face directly south (in the northern hemisphere) may receive significantly less than twelve hours of sunlight per day, depending on the direction they do face, and on the time of year. For ...