Mechanics of the Ayanamsha

[Guest guest]

Hello everyone,

 

For some times, I have tried to understand and find a logic behind the

ayanamsha evaluation... A French astrologer, Denis Labouré, once stated that

the correct ayanamsha was either the one of Krushna or the one of Bhasin

(these are near Raman).

 

However, I find all this very " mathematical " and theorical. I would like to

know if the ayanamsha is still evaluated on the basis of the fixed stars

(espacially Spica/Chitra and Zeta Piscium/Revati)?

 

Actually I have come to the conclusion that it is, using the rising and

espacially the setting of the star Spica, to a null latitude (0°

0' N). The result are near both Bhasin and Krushna ayanamshas (using the

excel worksheet). To make this calculations, I used Astrolog32 and a

modified fixed stars which includes Spica and Zeta Piscium.

 

For excel worksheet, go to http://krushna.sageasita.com/kas_worksheets.htm

 

The idea is to know the time when Spica sets at 0°N of latitude, to

calculate the chart of this specific moment and adjust the offset of the

ayanamsha in such a way that the rising sign equates 0°10'01' Aries (Revati

being considered once at 29°49'59 " Pisces).

 

The logic behind my reasonning comes from this sentence of Hipparchos, taken

on the Swiss Ephemeris website

http://www.astro.com/swisseph/swisseph.htm#_Toc6813679:

 

" Raymond Mercier has shown that all of the ancient Greek and the medieval

Arabic astronomical works located the zero point of the ecliptic somewhere

between 10 and 22 arc minutes east of the star zeta Piscium. This definition

goes back to the great Greek astronomer Hipparchus. How did he choose that

point? Hipparchus said that the beginning of Aries rises when Spica sets.

This statement was meant for a geographical latitude of 36°, the latitude of

the island of Rhodos, which Hipparchus' descriptions of rises and settings

are referred to. " .

 

The important sentence being " Hipparchus said that the beginning of Aries

rises when Spica sets " .

 

For example, today december 4, 2004.

 

At a longitude of 0°W and a latitude of 0°N, Spica sets at 14h30m27s. So, if

I adjust the ayanamsha offset for the ascendant to be at 0°10'1 " Aries, it

must be 22°54'57.351 " , according the my software. The excel worksheet gives

22°55'6 "

 

The results I get using this method seem always near to those of Krushna

ayanamsha worksheet results. Also, I come to believe that Spica was never

meant to be at 0° Libra.

 

Can anyone explain clearly and easily this mechanic of the ayanamsha? Also,

must we evaluate the ayanamsha for a null latitude (0°N), to be valid for

all the Earth?

 

--

Best regards - François