This short video demonstrates the lop-sided figure-eight path (analemma) that the Sun. The midday sun comes later by the clock on the June solstice than it does one week before. Therefore, the sunrise and sunset times also come later by the clock. Because of this motion, the Sun’s path through the sky, when charted on a day-by-day basis, appears to take a lopsided figure-8 pattern astronomers call an “analemma.”īecause of this, the conventional wisdom that the Sun lies directly overhead at noon, splitting the day into two equal parts, is actually not true. The Earth moves faster in its orbit during January (when we’re closest to the Sun) than in July, when we’re farthest away. The discrepancy is caused by the Earth’s elliptical orbit around the Sun. Since I already have a RTC (DS1307) and a SPI connected floating point processor (Micromega FPU V3.1) I will try to find a solution using the algorithm below. While everyone knows that the days are longer in the summer, many people are surprised to learn that the earliest sunrise of the year doesn’t occur on the longest day of the year-the summer solstice, which falls on June 21st-but comes nearly a week before it. I need the exact sunrise & sunset times per latitude/longitude/GMT locations for automatic home automation control. every day from June 11th through the 17th, but it will actually rise a few seconds earlier on the 14th than it does on the 13th or the 15th.
(at 40° North Latitude*). Actually, the sunrise times are listed at 5:30 a.m.
If you open your copy of the 2022 Farmers’ Almanac to page 144, you’ll see that in the Northern Hemisphere, the earliest sunrise for the year is June 14.
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