Vedic Astrology: Calculation of Ascendant or Lagna
Ascendant is the point of ecliptic on the eastern horizon at a specific time. Let us calculate the ascendant step by step To calculate this point tropical longitude of sun is required. Step 1: Calculate the tropical longitudes of the sun. Tropical longitude of sun = Nirayana longitudes + Ayanamsha. Step 2: Calculate the difference between the birth time (LMT) and a sunrise on a given day. This is called as Ishta kala . Step 3: Consider the sign in which the sun is in and the degrees he has traversed in that sign. ( Note: Consider the tropical longitudes of the Sun. ) Step 4: Calculate by direct proportion the expired portion of the sign the sun is in at the time of sunrise. Step 5: Calculate the unexpired portion by deducting the expired portion of the sign as calculated in the fourth step. Step 6: The duration as calculated in the 5 th step should be deducted from the Ista Kala . If duration of the sign is greater than Ista Kala then ig...
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