Lines Matching refs:variation
1091 // Annual Eqn: variation in the effect due to earth-sun distance
1115 // And finally, find the variation, caused by the fact that the sun's
1119 double variation = 0.6583*CalendarAstronomer::PI/180 * ::sin(2*(moonLongitude - sunLongitude));
1121 moonLongitude += variation;
