Rahu and Ketu in your kundli, and how their positions are worked out

Rahu and Ketu are not planets. They are the two points in the sky where the Moon's path crosses the Sun's path, and because they are two ends of one line they are always exactly opposite each other, six rashis apart. Find one and you have found the other.

Their positions come out of the same calculation as everything else in a kundli: your date, your time and your place, run against the sky's actual geometry. They move backwards through the zodiac, take about eighteen months to cross one rashi, and complete the full circle in a little over eighteen years.

Why they are called shadow grahas

Nothing is there to see. Where the two paths cross is a mathematical point, which is why the tradition calls them chhaya grahas, shadow grahas, and gives them no body, no light and no ownership of a rashi in the way the others have.

They matter astronomically for one reason. An eclipse can only happen when the Sun and Moon are near one of these two points, which is exactly why the older texts describe Rahu and Ketu as swallowing the Sun and the Moon. That story is a description of eclipse geometry told as a story, and it is the origin of the heavy reputation both carry.

One practical detail if you compare two charts and the degrees disagree slightly. There are two ways to compute the nodes, an averaged one and a true one that includes the small wobble in the Moon's orbit. They differ by up to about a degree and a half. Most Indian software uses the averaged value by tradition. It rarely changes the rashi, occasionally changes the nakshatra, and is worth knowing before you decide one chart is wrong.

What tradition holds about them

Rahu is read as amplification and hunger. It is associated with foreign things, with anything unconventional or newly arrived, with sudden rises and equally sudden reversals, and with wanting more of whatever house it sits in. Where Rahu sits, tradition holds, a person is rarely satisfied and often unusually driven.

Ketu is read as the opposite motion, subtraction and detachment. It is associated with what has already been finished, with skill that seems to arrive without training, with indifference, and with an itch to let go of the affairs of the house it occupies.

Because they are opposite, a chart always has one axis with hunger at one end and disinterest at the other. That axis is genuinely useful in a reading. It often shows where a person is pouring effort and where they are quietly withdrawing, and people usually recognise it immediately when you name it.

Both also run long periods. Rahu's long period runs eighteen years and Ketu's seven, and in a reading these are among the stretches people ask about most, usually because someone has told them to be afraid of one.

About Kaal Sarp

This is what most people are really searching for, so let me be direct.

Kaal Sarp is the name given to a chart where all seven of the other grahas fall on one side of the Rahu and Ketu axis. It is a real and easily checked geometry. What it is not is an ancient doom. It is not found in the older classical material and appears to have entered popular practice comparatively recently. It has become one of the most profitable fears in Indian astrology. Rituals against it are sold repeatedly to the same worried families, and nothing in the geometry requires it.

What I actually do when a chart has it: I read where the axis falls and what the other grahas are doing, exactly as I would in any chart. Sometimes the concentration on one side genuinely describes a life with a narrow, intense focus. Often it describes nothing much at all, because the arrangement is not rare. If someone quotes you a price to remove it before they have read the rest of your chart, walk away.

The same applies to the general fear around Rahu and Ketu periods. They are demanding stretches in most lives and they are not sentences. What a reading can honestly tell you is which house is being worked on and roughly when the pressure eases. What it cannot tell you is that something specific will happen.

Finding yours

Any properly computed chart shows both, and you can cast one for yourself in the free kundli. Read three things. Which rashi each of them occupies, which house each falls in counting from your lagna, and which grahas sit with them or look at them. The house placement is the part that decides what area of life the axis is about, which is why the lagna and the birth time matter so much.

If Saturn is also active in your chart at the moment, the piece on Sade Sati is worth reading beside this one, because the two get confused with each other constantly. A written reading or a sitting, where the axis is read as part of the whole chart rather than on its own, is on the services page.

Questions people ask

Are Rahu and Ketu always in opposite rashis?

Yes, always, and always at the same degree of their respective rashis. They are two ends of one line through the earth, so if Rahu is at 14 degrees of Mithuna, Ketu is at 14 degrees of Dhanu. If a chart shows them anywhere else, the chart is wrong.

How long does Rahu stay in one rashi?

About eighteen months, moving backwards through the zodiac, so roughly eighteen and a half years for the full circle. This is why Rahu and Ketu transits are talked about as long seasons rather than as passing moods, and why they tend to line up with stretches of life rather than with single events.

Does Kaal Sarp dosha need a remedy?

Not on its own, and not before someone has read the rest of your chart. It is a description of where the grahas are grouped, it is not uncommon, and it is not found in the older texts. If a specific period in your life is difficult, the honest work is to read what is running and say plainly what tradition indicates and what is simply your own decision to make.