Value Of Ayanamsa

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Dear Mr. Patnaik ,

Ayanamsa is angular arc between two points namely initial point of sidereal

Aries(Acvani)

and first point of tropical Aries.

First point of tropical Aries is called V.E.POINT .This is point of

intersection

of ecliptic and equator of date.Incidently both these planes are continuously

vibrating

due to gravitational and other forces exerted on earth mainly by Moon and Sun.

Thus

mean position of equinoxes go on varying slightly. This is corrected by addition

or subtraction

of Nutation of the day. Thus

  True position of equinox = Mean position of equinox - /+ value of nutation

of the day 

   Modern Astronomers calculate Nutation and Aberration based on new constants

and there is a

 big advancement in this direction. This done based on1979 IAU THEORY OF

NUTATION.

(You may refer 'INDIAN ASTRONOMICAL EPHEMERIS' which is published every year by

IndiaMetrological Department).

 

The second quetion arises as to how fix the initial point of sidereal Aries.

This has to be fixed

with help of some fixed star. The followers of Citrapakchha Ayanamsa recommend

that

Star Citra (Spica 16) should act as reference point and its sidereal TRUE

longitude should be assumed as 180 deg on ecliptic. The following aspects are to

be shorted out:

1. Every star has its proper motion. The longitude of Spica along the ecliptic

has diminished

by 60 sec during the period 1724 years from  VE DAY falling in the year 285

A.D

2. The latest Sixth Fundamental Catalogue (FK6)indicates Mean tropical positions

of the stars.

   On the other hand ,the apparent geocentric longitudes and latitudes are

referred to the true

   equinox and ecliptic of date and corrected for planetary aberration.

3.Obuously , first point of Aries is to be fixed after taking into account the

displacement in star position due to above factors.

   True position of star = Mean position of star -/+Nutation of the day =180

deg.

 

Needless to say that modern astronomy has already measured these values , only

astrologers

are required to adopt them properly.

Precession rate in long. per tropical year=50 " .29,per sid.year=50 " .26

Regards

 

G.K.GOEL

 

G.K.GOEL

 

 

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