However,
if at the end of a tropical year from one vernal equinox to the
next, we consider the position of the earth with reference to
a fixed star of the zodiac (The Ayanamsha
is based on the position of the constant star Spica), the
earth appears to lie some 50.2719 seconds of celestial longitude
to the west of its original position. In order for the earth to
attain the same position with respect to a fixed star after one
revolution, it takes a time span of 365 days 6 hours 9 minutes
and some 9.5 seconds. This duration of time is called a sidereal
year .The sidereal year is just over 20 minutes longer than the
tropical year; this time difference is equivalent to 50.2719 seconds
of celestial longitude.
Each year, the Vernal equinox will fall short by 50.2719 seconds
along the zodiac reckoned along the fixed stars. This continuous
receding of the Vernal equinox along the zodiac is called as the
precession of equinoxes.
This in other words, means that the plane of the equator intersects
the plane of the ecliptic at a constantly shifting point. This
point, the first point of Aries or the vernal equinox, goes on
receding westward at a rate of approximately 50.2719 seconds of
arc each year. This is called the precession of the equinoxes.
The result of this precession is a slow increase in the right
ascensions of almost all fixed stars in the zodiac. This precession
takes some 25,800 (or approximately 26,000) years to complete
one circle. As will be seen, an appreciation of this precession
is of paramount importance in the understanding of the basic concepts
of Vedic astrology.
Ayanamsha: (The
sayana and the niryana system)
It has been seen that because of the precession of equinoxes at
a rate of 50.2719 seconds per year, the distance between the Vernal
equinox (the 1st point of the movable zodiac) and the 1st point
of Mesha (Aries) on the fixed zodiac has been progressively increasing.
This distance at any given epoch is called as the Ayanamsha .The
Ayanamsha thus indicates the difference between the fixed zodiac
and the movable zodiac. The system that considers the fixed zodiac
is called the Niryana (without ayana!) system, while the one that
considers the movable zodiac is called the Sayana (with ayana!)
system. The Niryana values of planetary longitudes can be obtained
by subtracting the Ayanamsha for a given time from the Sayana
longitudes.
There
have been few astrologers who have tried to give the exact date
of Niryana and the Sayana zodiacs coincidences for example Lahiri
gave 22 march 0285. That’s mean in the year 285 AD when the Ayanamsha
was zero. Same Fagan gave 1 January 0221 of coincidences. Tarun
Chopra Gave the date of coincidences of two Zodiacs was 1 January
1155.
If we calculate the horoscopes at the given years with Tropical system and
with sidereal Ayanamsha we should get the exact planetary positions.
If we calculate this with Lahiri we find that there was a difference
in tropical and lahiri’s as on 22 mar 0285 planets were same and
but there was a minute difference in Saturn degrees, Jupiter degrees
and moon degrees. In the same way we tried to calculate all other
horoscopes with all Ayanamsha we saw some minute differences it
was just a difference of seconds but a second difference means
that it was not the time when these two zodiacs were same.
When we tried With Tarun Chopra’s Ayanamsa and to our wonder
it was exact in degrees as well as minutes. So this means we can
rely on Tarun Chopra’s Ayanamsa for calculating our horoscopes.
Get Your Horoscope with Tarun Chopra Ayanamsa. Download Free Vedic Astrology Software and the Ayanamsa value file which has to be used in the Software
Tarun Chopra Ayanamsa gives a true horoscope; this has been observed by many Astrologers, who are switching to Tarun Chopra Ayanamsa these days.
"Human life has been highlighted by vimshottari dasha. When ever an individual gets an event in life, that event is reflected by the vimshottari dasha.
A unique phenomena has been observed by those vedic astrologers who have switched to Tarun Chopra Ayanamsa, that the individual gets an event on the same date when the dasha changes. And there is no need to see the Transit of planets for analysing a horoscope as the dasha system is perfect when we use this ayanmasa.
With this an Astrologer can foresee the event of a person’s life exactly. And due to this reason Tarun Chopra who is practicing Vedic Astrologer able to forecasts event dates precisely".
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