CALCULATION OF THE AYANAMSA [1]There are two systems of Astronomy in India - namely the Nirayana and the Sayana. The former
traces observations of planets to a fixed Zodiac, while
the latter considers the moving Zodiac commencing
from the shifting, Vernal Equinox. It is certain that
the greatest Hindu astrological writers referred to the
fixed Zodiac for predictions. And this fact is borne
out by experience.The increment between the beginning of the "fixed" and the "moveable" Zodiacs or the Nirayana and
Sayana positions is referred to as Ayanamsa which
increases about 50 1/3 seconds every year. Western
Astronomy is based upon the Sayana system so that
it considers the moving Zodiac commencing from the
shifting Vernal Equinox as has already been said above.
Thus, if we deduct this Ayanamsa from the positions
of planets and cusps of the houses obtained according
to the western system we will arrive at the Hindu positions.When exactly the two Zodiacs were in the first point is doubted by a number of astronomers and accordingly the Ayanamsa-precessional distance-varies
from 19° to 23°. I do not wish to enter into explaining
the complicated processes of astronomy at large
which centre attention on the discussion of the exact
nature of Ayanamsa but merely confine myself to
giving a suitable and simple method for determining
the Ayanamsa.First of all, cast the horoscope of birth according to the European manner and convert it into the terms of the Hindu Zodiac by the following process :- - (1)
- Subtract 397 from the year of bitrh (A.D.).
- (2)
- Multiply the remainder by 50 1/3 seconds; and reduce the product into degrees, minutes and seconds.
- (3)
- Subtract this number of degrees, minutes, and seconds from the cusps of the houses and planets' positions in the European figure of birth and the figure thus obtained will be according to the Hindu system.
Example:-
Determine the Ayanamsa for 1912 A.D.? 1912 - 397 = 1515 * 50 1/3 " = 76255" 76255" = 21° 10´ 55" This is the Ayanamsa for 1912 A.D. |

DATA for 0h 1 JANUARY 1912 [2]

Ayanamsa on Spica = 22° 37´ 33"

SVP on Aldebaran = 06° Pi 29´ 26"

Literature :

1/ B.V.Raman, M.R.A.S. : HINDU PREDICTIVE ASTROLOGY,

2/ THE ROSICRUCIAN EPHEMERIS.

1/ B.V.Raman, M.R.A.S. : HINDU PREDICTIVE ASTROLOGY,

2/ THE ROSICRUCIAN EPHEMERIS.

... Beta version!

First on November 30th, 1997.