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The time when the Sun transits the observer's meridian depends on the geographic longitude. To find the Sun's position for a given location at a given time, one may therefore proceed in three steps as follows: [1] [2] calculate the Sun's position in the ecliptic coordinate system, convert to the equatorial coordinate system, and
The 43rd parallel north is a circle of latitude that is 43 degrees north of the Earth's equatorial plane. It crosses Europe, the Mediterranean Sea, Asia, the Pacific Ocean, North America, and the Atlantic Ocean. The South Dakota-Nebraska border. On 21 June the sun averages, with negligible variance, its local maximum, 70.83 degrees in the sky. [1]
Ohio Stadium, one of the largest stadiums in the world, barely misses the parallel 40° north (6 seconds or 185 metres (607 ft) above 40° north). Baseline Road in Boulder, Colorado, traces the parallel 40° north. Thistle, Utah, a ghost town since 1983, is slightly (30 seconds or 956 metres (0.594 mi)) below 40° north.
It is the complement to the solar altitude or solar elevation, which is the altitude angle or elevation angle between the sun’s rays and a horizontal plane. [4] [5] At solar noon, the zenith angle is at a minimum and is equal to latitude minus solar declination angle. This is the basis by which ancient mariners navigated the oceans. [6]
The Carrington heliographic coordinate system, established by Richard C. Carrington in 1863, rotates with the Sun at a fixed rate based on the observed rotation of low-latitude sunspots. It rotates with a sidereal period of exactly 25.38 days, which corresponds to a mean synodic period of 27.2753 days.
It is the complement to the solar altitude or solar elevation, which is the altitude angle or elevation angle between the sun’s rays and a horizontal plane. [ 1 ] [ 2 ] At solar noon , the zenith angle is at a minimum and is equal to latitude minus solar declination angle.
At this latitude midnight sun lasts from about May 16th to July 27th, and civil polar twilight from November 25th to January 16th. At noon on the summer and winter solstices, the altitude of the sun is 43.45° and -3.04° respectively. At midnight on the summer solstice, the altitude of the sun is 3.64°.
The solar azimuth angle is the azimuth (horizontal angle with respect to north) of the Sun's position. [1] [2] [3] This horizontal coordinate defines the Sun's relative direction along the local horizon, whereas the solar zenith angle (or its complementary angle solar elevation) defines the Sun's apparent altitude.