Astronomical True Rahu VS Astro-Logical Mean Rahu

[Guest guest]

Respected Sir.

Are you using True Rahu or Mean,wht is the value in Mean if given is

of True, and which one is more accurate.

There is an article for Mean and True Rahu.

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The Nodes do not move at an entirely predictable speed and vary from

day to day. They are either calculated as " True " or " Mean. " True is

the ' exact' position of the Nodes at any given time, while Mean is

the presumed position based on the average speed. With the assistance

of computers, most astrologers have opted to use the True Node, but

the matter of which is more eloquent is still debated. The Mean Node

is always retrograde, whilst the True Node may occasionally be

direct, as if it's wobbling. That's because the True Node takes the

gyroscopic relationship of the Sun/Moon into account. It may be

argued, then, that it now makes little sense to use the Mean Node

when it is just as easy to calculate the True Node.

 

However, this is somewhat illusory, since " in the strict sense of the

word, even the " true " nodes are true only twice a month, viz. at the

times when the moon crosses the ecliptic. Positions given for the

times in between those two points are just a hypothesis. They are

founded on the idea that celestial orbits can be approximated by

elliptical elements. This works well with the planets, but not with

the moon, because its orbit is strongly perturbed by the sun. Another

procedure, which might be more reasonable, would be to interpolate

between the true node passages. The monthly oscillation of the node

would be suppressed, and the maximum deviation from the

conventional " true " node would be about 20 arc minutes " See the Swiss

Ephemeris for further explanation. I would therefore recommend

experimenting with both systems. An obvious advantage of using the

Mean Node is that it is what was used traditionally, so most

commentaries of the meanings will have used this method.

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Best Regards

Ashish Seth

 

Which One Is Correct and why is Mean Rahu taking 18.6 years for

Revolution...