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A line graph of the Sun's declination during a year resembles a sine wave with an amplitude of 23.44°, but one lobe of the wave is several days longer than the other, among other differences. The following phenomena would occur if Earth were a perfect sphere , in a circular orbit around the Sun, and if its axis were tilted 90°, so that the ...
April 20, 2023 Solar Eclipse Parameters Parameter Value Eclipse Magnitude 1.01320 Eclipse Obscuration 1.02657 Gamma −0.39515 Sun Right Ascension 01h51m01.7s Sun Declination +11°24'54.1" Sun Semi-Diameter 15'55.4" Sun Equatorial Horizontal Parallax 08.8" Moon Right Ascension 01h51m43.2s Moon Declination +11°04'16.7" Moon Semi-Diameter 15'53.6"
Solar longitude, commonly abbreviated as Ls, is the ecliptic longitude of the Sun, i.e. the position of the Sun on the celestial sphere along the ecliptic.It is also an effective measure of the position of the Earth (or any other Sun-orbiting body) in its orbit around the Sun, [1] usually taken as zero at the moment of the vernal equinox. [2]
The root of the word declination (Latin, declinatio) means "a bending away" or "a bending down". It comes from the same root as the words incline ("bend forward") and recline ("bend backward"). [2] In some 18th and 19th century astronomical texts, declination is given as North Pole Distance (N.P.D.), which is equivalent to 90 – (declination ...
Sun path, sometimes also called day arc, refers to the daily (sunrise to sunset) and seasonal arc-like path that the Sun appears to follow across the sky as the Earth rotates and orbits the Sun. The Sun's path affects the length of daytime experienced and amount of daylight received along a certain latitude during a given season.
The Almanac specifies for each whole hour of the year the position on the Earth's surface (in declination and Greenwich hour angle) at which the Sun, Moon, planets, and First Point of Aries [clarification needed] is directly overhead. The positions of 57 selected stars are specified relative to the First Point of Aries.
Sun Right Ascension 13h59m20.5s Sun Declination -12°10'17.0" Sun Semi-Diameter 16'05.0" Sun Equatorial Horizontal Parallax 08.8" Moon Right Ascension 14h01m10.9s Moon Declination -11°14'16.0" Moon Semi-Diameter 15'52.6" Moon Equatorial Horizontal Parallax 0°58'16.0" ΔT 70.9 s
Shown below is a table displaying details about this particular solar eclipse. ... Sun Declination +13°30'28.8" Sun Semi-Diameter ... Solar eclipse of April 20, 2023 ...