The Ascendant is defined as the point of intersection between the Ecliptic and the Celestial Horizon and is the Eastern Celestial Horizon. It is represented by the formula

Tan L = Sin E / cos E cos w – Sin w Tan A

where A is the Latitude of the place, w is the maximum declination of the Sun, E is the Right Ascension of the East Point ( Sayana Kala Lagna ) and L – the Lagna.

Raseenam Udayo Lagnam – Udaya Lagna, the Ascendant, the axis of the horoscope, is the Celestial Horizon of the East. In Astrology everything is based on Lagna, Sarvam Lagnepi Chinthayel.

180 degrees opposite the Ascendant is the Descendant, the Astha Lagna and is the Western Celestial Horizon.

Bhujamsa are the degrees traveled by the planet in the Zodiac. In the mighty 360 degree Circle, the planet can be anywhere and its position is its mean longitude. The planet is actually on the ellipse and its position is the true longitude of the planet.

If the planet is at 42 degrees, then the Bhuja Equation states that your Bhujamsa is 42 degrees. That is in the first Oja Pada, in the first quarter of 0-90 degrees, the Bhujamsa is the same.

If the planet is at 110 degrees, then the Bhuja Equation states that your Bhujamsa is 70 degrees. That is in the first Yugma Pada, in the second quarter of 90-180 degrees, the Bhujamsa is 180 – bhuja.

If the planet is at 200 degrees, then the Bhuja Equation states that your Bhujamsa is 20 degrees. That is in the second Oja Pada, in the third quarter of 180-270 degrees, the Bhujamsa is bhuja – 180.

If the planet is at 300 degrees, then the Bhuja Equation states that your Bhujamsa is at 60 degrees. That is in the second Yugma Pada, in the fourth quarter of 270-360 degrees, the Bhujamsa is 360 – bhuja.

Bhuja Jya is Sin (M) and is the sinusoidal value of Kendra. Bhuja Jya is used in the calculation of Epicycles, in the calculation of the Equation of Center for the Moon, Jupiter and Saturn.

The Manda Phala, the Equation of the Center is given by the formula

Equation of Center, Mandaphala = Circumference of the Epicycle (Parama Phala) * Manda Kendra Jya (Without M).

This is the equation used to calculate the 14 perturbations for the Moon, the five for Jupiter, and the six for Saturn.