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Default Ayanamsa Change in JHora 7.1

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Dear Narasimha

There is NOTHING WRONG in the name you have chosen. In fact, you

HAVE chosen the correct name which comes out of a sincere devotion for the

subject and the renunciation of ego. You could have named it Narasimha ayanamsa

or something like that or Sriharish ayanamsa...but then being very scientific

in disposition, you have refrained from that.

Vishnu-nabhi ayanamsa is the correct name. It is clear, to the

point and speaks for itself.

Shri Gopal K. Goel and I have been hoping that somehow we can have

what is called the *real chitrapaksha ayanamsa* where the star Spica (also

known as α Vir / α Virginis / Alpha Virginis) is kept at exactly 180 degrees

based on observed values for the star position. Fitting a mathematical equation

for this is another thing, but the basic value of ayanamsa maybe taken keeping

it at exactly 180 degrees for say, 1st Jan each year...then choose

some kind of curve fitting.

 

BTW...7.1 is very good. In the option of special Taras from

Moon/lagna can you give the Lord of Abhijit as *Sun* as most of Abhijit (more

than 90%) is in Uttarasadha...and then the other lords remain same as in Vimsottari.

The present scheme in JHora is a bit awkward. Take a look at this. I have given

the proposal in red...

Special tara (Moon) Meaning     Nakshatra Lord

 

Janma               Existence   PBha      Saturn [Jup ]

Karma               Work        Puna      Jupiter

Samudayika          Collective  Swat      Rahu

Sanghatika          Social      Hast      Moon

Jaati               Family      Aswi      Ketu

Naidhana            Death       Rohi      Moon

Desa                Nation      Asre      Mercury

Abhisheka           Coronation  Sata      Jupiter [Rah]

Aadhaana            Kindling    Visa      Jupiter

Vainasika           Destructive Mool      Ketu

Maanasa             Mental      Abhi      Moon [sun]

Thanks

Sanjay Rath

 

 

 

 

 

On Behalf Of Narasimha PVR Rao

04 April 2008 18:32

Ashish Sharma

Cc: jhora ; vedic astrology ;

sohamsa ; SriJagannath ;

sjc-guru ;

[Om Krishna Guru] Default Ayanamsa Change in JHora 7.1

 

 

 

 

 

 

Namaste,

 

A lot of people have asked this and I need to clarify about a change in the

default ayanamsa used in JHora 7.1.

 

The default has been changed from " Lahiri (Chitrapaksha) " to

" Vishnunabhi Plane (Chitrapaksha) " . The name was coined by me in a

hurry and perhaps unintuitive - I will rename it in future versions as

" Modified Lahiri (Chitrapaksha - fixed plane) " . If you like the plain

old Lahiri, you can change the default (In main menu, " Preferences "

>> " Related to calculations " >> " Ayanamsa " ).

Let me explain what the modification is.

 

In astrology, we project the planetary positions from the three-dimensional

space to a two-dimensional plane and find longitudes by measuring the angle

from a reference point (start of the zodiac) in that two dimensional plane and

the projection of planet on that plane. In regular ayanamsa implementations,

the two-dimensional plane onto which planets are projected for the purpose of

finding longitudes is *oscillating*. The plane in use at birth and the plane in

use in the annual chart of a year later and the plane used in transits are all

different.

 

When we are trying to fix the starting point of the zodiac in each ayanamsa,

does it make sense to have the " plane of zodiac " vary from day to

day?

 

Vishnunabhi plane chitrapaksha ayanamsa is a new addition in JHora 7.1. It is

essentially Lahiri ayanamsa only, but takes a fixed mean plane instead of the

oscillating plane. Thus, when we find planetary longitudes at birth and in an

annual Tajaka/Tithi Pravesha chart later or in transits later, the same fixed

zodiacal plane is used to project planets in all cases.

 

This is more consistent and logical. In my experience, it gives superior

results with annaul lunar return charts, which are very sensitive to this

change.

 

This normally makes very little difference in natal charts, but can change a

planet's sign in rasi or divisional charts in some border cases. It can also

change the nakshatra dasa dates by several weeks. This also makes a

considerable difference in Tajaka and Tithi Pravesha annual charts. The time of

the chart can change by upto 15 min and lagna in some divisional charts may

change in TP and Tajaka annual charts. Based on my experiments, I am convinced

that this works better than the regular Lahiri ayanamsa.

 

That is why I have changed the default in the software, but you can revert to

regular Lahiri if you are convinced that that is better.

 

In general, for questions on Jagannatha Hora software, please use the

" jhora " . Please go to

 

jhora

 

to or send a mail to jhora- .

 

Best regards,

Narasimha

-------------------------

Do Ganapathi Homam Yourself: <http://www.VedicAstrologer.org/homam>

Spirituality: <>

Free Jyotish lessons (MP3): <http://vedicastro.home.comcast.net>

Free Jyotish software (Windows): <http://www.VedicAstrologer.org>

Sri Jagannath Centre (SJC) website: <http://www.SriJagannath.org>

-------------------------

 

---- Ashish Sharma <ashi078

wrote:

> Dear Sh. PVR ji,

>

> I just want to highlight the difference in charts using different versions

(7.02 and 7.1b2) of JHORA.

>

> First, let me thank you for this software and I sincerely appreciate your

efforts into this.

>

> Now, the issue:

>

> When I use create chart for a native having DOB 2nd Aug 1985, Kangra (HP,

India), the horoscope caste by above mentioned different versions of JHORA is

different. I couldn't understand why? The horoscope coming with old version

seems to be correct one as per different tools in other websites.

>

> Also, using 7.1b2, the Mahadasa calculation for native (22nd july 1980,

7.10 AM Delhi, India) is different when compared with old version. Sani

Mahadasa ends on 18th April 08 as per new version but as per old version, it

should end in last week of Mar 08. Again, old version seems to give correct

calculation.

>

> This is just an feedback so that you may look into this (per your time

permitting) and carry out modifications, if required.

>

> Regards

> Ashish

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Guest guest

Narasimha’s outstanding dedication and contribution to Jyotish is most

admirable and he has my deepest appreciation for sharing the excellent

JHora software. Furthermore, his constant research and refinement of

the already superb software is just a boon for us aspiring Jyotishas,

many thanks Narasimha!

 

That said, I am wondering if the esteemed Sanjay Rath and other gurus

also feel that the new Vishnunabhi plane chitrapaksha ayanamsa is more

accurate than the regular Lahiri ayanamsa, as their dasa dates vary by

many weeks.

 

Thanks in advance,

 

Leo

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