This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

Herein is the calculation of the Ascendant Sanskrit: Lagna; the point of the zodiac rising on the eastern horizon, the calculation of the desired time, the calculation of the Tenth House Sanskrit: Dashama-lagna; the Midheaven or Zenith, and the calculation of the Hour Angle Sanskrit: Nata; the angular distance from the meridian. Among these, he first describes the calculation of the Hour Angle. When the desired time is before midday, it should be subtracted from the elapsed ghatis A ghati is a unit of time equal to 24 minutes of the half-day; then it becomes the "East Hour Angle" of the day. At night, when the desired time is before midnight, it should be subtracted from the elapsed ghatis of the half-night; then it becomes the "East Hour Angle" of the night. When the desired time is after midday, the half-day portion should be subtracted from the desired ghatis elapsed since sunrise; this becomes the "West Hour Angle" of the day. Similarly, when the time is after midnight, the half-night portion should be subtracted from the desired ghatis elapsed since sunset; this becomes the "West Hour Angle" of the night. || 20 || The True Sun Sanskrit: Tatkalika-arka; the sun's position at the specific moment should be added to the Precession of the Equinoxes Sanskrit: Ayanamsha. From the multiplication of its elapsed or remaining degrees: when
/ Now, the calculation of the Houses is described:
The East Hour Angle is the half-day or half-night portion minus the elapsed ghatis to be subtracted. Subtracting the half-day or half-night portion from the desired ghatis of day or night results in the West Hour Angle. || 20 || From the multiplication of the elapsed or remaining degrees of the Sun with Precession Sanskrit: Sayana-arka at that time || by its own rising time and divided by thirty (30), the result is what is elapsed or remaining; this should be subtracted from the Sun's position. || 21 || || || || || ||
the Negative Ascendant Sanskrit: Rina-lagna; used in specific retrograde or reverse calculations is to be calculated, then the elapsed degrees should be taken. When the Positive Ascendant Sanskrit: Dhana-lagna is being calculated, then the remaining degrees should be taken. The rising time of the sign Sanskrit: Svodaya should be multiplied by these and divided by thirty. The result, whether it be the Sun's elapsed or remaining portion, should be subtracted from the desired ghatis. Thereafter, from the remainder, one should calculate the ascendant using the upcoming rising times. Similarly, when the elapsed time is to be calculated, the previous rising times should be subtracted from the multiplied rising time. When the remaining time is to be calculated, the subsequent rising times should be subtracted from the multiplied rising time. The remainder of the subtraction is multiplied by thirty (30). That which cannot be further subtracted is the Incomplete Rising Sanskrit: Ashuddhodaya. The result obtained by dividing by that should be taken as degrees and so on. This should be subtracted from the incomplete sign or added to the completed sign. Thus, by the calculation of the Negative and Positive Ascendants, when the number of the earth A poetic term for the number 1 becomes the Incomplete Rising, then the sign number—
The calculation of the houses involves determining the precise zodiacal point on the horizon and the meridian to establish the astrological chart.