4 articles for "Ascensional Difference"
Ascensional Difference [Astro*Index]The angular difference measured along the celestial equator between a body's right ascension and its oblique ascension.
sin AD = tan(í) * tan(ë), or
AD = arcsin( tan(í) * tan(ë) )where í is the latitude and ë is the declination.
See also:Ascensional Difference [Munkasey M.]
♦ Angular ♦ Celestial Equator ♦ Right Ascension ♦ Oblique Ascension
A measurement of arc, in degrees, alongthe Celestial Equator, between the point of Right Ascension for a body and that body's point of Oblique Ascension.
See also:Ascensional Difference [DeVore]
♦ Angular ♦ Celestial Equator ♦ Right Ascension ♦ Oblique Ascension
The difference between the Right Ascension of any body and its Oblique Ascension: used chiefly as expressing the difference in time between the rising or setting of a celestial body, and six o'clock; or, six hours from the meridianal passage. To find this, add the log. tangent of the declination of the planet, to the log. tangent of the latitude of the place. The sum will be the log. sine of the Ascensional Difference. This added to the planet's Right Ascension, when in South declination (or subtracted, when in North declination), gives the Oblique Ascension of the planet. The reverse process yields the Oblique Descension.
See also:Ascensional Difference Under its Pole [Munkasey M.]
♦ Angular ♦ Celestial Equator ♦ Right Ascension ♦ Oblique Ascension
An Equatorial arc used inthe system of Primary Directions. It measures a body's arc distance from another body along the Celestial Equator.
See also:
♦ Angular ♦ Celestial Equator ♦ Right Ascension ♦ Oblique Ascension
Astro*Index Copyright © 1997 Michael Erlewine
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