Peck, William G. (William Guy), 1820-1892 · New York, Chicago, A. S. Barnes & company · leaf 20
K is the summer and Kis the winter solstice ; the angle QEKmeasured by the arc QK is the obliquity ofthe ecliptic ; PVPA is the equinoctial col-ure ; PQPQ is the solstitial colure; PSRis part of the hour circle of the body S;and the angle QPR, measured by the arcQR, is the hour angle of S. The… … Illustration of definitions. Right Ascension and Declination. 16. The right ascension of a heavenly body is the arcof the equinoctial included between the vernal equinox andthe hour circle of the body. Thus, in Fig. 3 the arc VK isthe right ascension of the body S. Right ascensions are reckoned…
Astronomy
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