♦ Equatorial Coordinates ♦ Celestial Coordinates ♦ Declination ♦ Equator Right Ascension of the IC "a" is also used to represent the "Semi-Major Axis" in an Ellipse.ĭistance measured along the celestial equator, Eastward from the point of the Spring Equinox or, as sometimes described, distance along the circle of declination. ♦ Equatorial Coordinates ♦ Celestial Coordinates ♦ Declination ♦ Equator Right Ascension Ī measurement in Hours - Minutes - Secords, or degrees, along the Celestial Equator from the point of Aries counterclockwise to the Hour Circle of a body. Right Ascension is measured northward from the east point of the equator to the vertical circle (90° to the equator) that runs through the planet or point to be measured. The first of the two coordinates of the equatorial system of celestial coordinates (the other coordinate is declination). 6 articles for "Right Ascension" Right Ascension
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