[SJC: Achyuta Gurukul] Geocentric Vs Topocentric

HARE RAMA KRISHNA

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

Hi

The reason for taking the centers of the planets (modeled as spheres)

is that, the ratio of the distance from earth (center) to planet

(center) to the radius of the planet is a very large number...

So all planets can be modeled as points in space..conveniently

However for the MOON, as you have pointed out, the distance from

earth, is the shortest compared to all the other planets, which

introduces a difference of a order of minutes in the calculations.

I do not think it is of the order of degrees like you have mentioned.

this difference can be omitted..safely

Nevertheless, considering the topocentric coordinates, only for moon,

is the most accurate and right way of calculation and is very easy to

implement in software programs.

, "sramkumar1 <sramkumar1>"

<sramkumar1> wrote:

>

> Please let me know if you have any references on this in the

classics

> for the grahas.

> I am getting confused because the topocentric position of Moon can

be

> more than 1 degree in difference from its geocentric position and

the

> dasa/bhukthi calculations can go off.

>

> Thanks,

> Ram

> , "R. S. Venkatachalam"

> <venk@m...> wrote:

> > In actuality the graha positions are all geocentric. When it

comes

> to

> > determining the lagnam, it is location specific (topocentric).

> > Therefore, you can have three people born at the same time, one

in

> > delhi, one in london and one in New York. All three will have

the

> same

> > graha positions, but their lagnams will differ.

> > Hope this clears it up.

> >

> > Regards

> > Venkatachalam

> >

> >

> > sanjayprabhakaran wrote:

> >

> > > Hare Rama Krishna,

> > > Dear Ram,

> > > From what I have concluded from the Sun rise argument etc in

the

> > > list, The Topocentric positions are to taken. What matters is

> planet

> > > positions from where you are on the earth rather than the

> positions

> > > as reckoned from the center of the earth.

> > >

> > > Warm Regards,

> > > S. Prabnhakaran

> > >

> > > , "sramkumar1

> <sramkumar1>"

> > > <sramkumar1> wrote:

> > > > Gurus,

> > > > Please forgive me for this basic doubt.

> > > > What coordinates are to be used for casting horoscopes -

> geocentric

> > > > or topocentric.

> > > >

> > > > Thanks,

> > > > Ram

> > >

> > >

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