Question of Ayanamsa/ parallax/ sunrise

[Guest guest]

Jaya Jagannath

Dear Mani-ji,

The refraction correction has to be made. The details as well as

Varahamihira's sloka can be had from N.C.Lahiri's Tables of Sunrise and

Sunset. Local Horizon is used for Pooja.

Best Regards,

Sanjay Rath

-

Mani <subra

<gjlist

Friday, July 09, 1999 11:43 AM

Re: Question of Ayanamsa/ parallax/ sunrise

 

 

> Sanjay Rath wrote:

> > Since we are already using an "Approximate method" for determining

these

> > sub and sub-sub periods, let us at least stick to the Lahiri Ayanamsa

and

> > the 365 Day year. Even in the computation of sunrise the "western" error

of

> > using the centre of the Sun has crept in. I am not sure if GJ version

2.26

> > has this feature of correftly estimating the sunrise from the first

sight

> > (Limb) of the Sun. Please confirm.

>

>

> Dear Sanjay,

>

> I do not understand you: are you suggesting that the first sight

> (Limb) of the Sun is the correct sunrse? If so, I do not dare to refute

your

> views, but beg permission to present certain problems, with the hope you

will

> give suitable solutions.

>

> 1. I have read in many places in Indian books that only the entre of the

sun

> should be taken, quoting old texts. So it cannot be really called a

western

> error. But that is not the point: what do the ancient authorities really

say?

> Are they unanimous?

>

> 2. There will be three different times of limb rising:

> - when limb reaches geocentric east.

> - when limb reaches local horizon.

> - when limb is seen at local horizon, earlier than the above, owing to

> refraction.

>

> Which one do you say is correct? A further complication: the local

horizon can

> be actual, depending on the altitude of the place, or at mean sea level at

that

> latitude and longitude!

>

> 3. Would these things not apply to the Moon as well?

>

> Regards

> Mani

>

 

 

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