Example: calculation of the domitude of Venus (1st quadrant), in the chart of Roland Petit:
radix: january 3 1924 / 11h00 TU / Villemomble 2E30 48N53
MD of Venus: 46 °, 21 (right ascension of Venus - right ascension of MC); SAd of Venus: 71 °, 32 (90 ° - DA, in negative declination);
90 ° multiplied by 46.21 and divided by 71.32 = 58.31;
Domitude of Venus: 328 °, 31 (270 ° + 58 °, 31), or 328 ° 20 ’.