Ketu Mahadasha

Seven years under the south node — the shortest of the shadow-planet periods, and the one the cycle begins with.

Ketu mahadasha at a glance

Ketu holds seven of the hundred and twenty years, and it sits at the head of the Vimshottari order: the sequence is reckoned Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, and returns to Ketu. That placement is not a statement about importance. It follows from the nakshatra count — Ashwini is the first asterism of the sidereal zodiac and Ketu is its lord, so the wheel is named from where it starts rather than from what matters most. A chart only opens in Ketu if the Moon stood in Ashwini, Magha or Mula at birth; every other chart meets this period somewhere in the middle of a life, or not at all.

Seven years, and why they pass differently from Mars's seven

Ketu and Mars are the only two lords allotted the same span, and the coincidence is a useful teaching case. Seven years is short enough that a Ketu period rarely covers more than one distinct phase of a life — a schooling, a posting, a marriage — where Venus's twenty or Saturn's nineteen can span three or four. What the classical writers say about Ketu is not that its years are eventful but that they are difficult to narrate afterwards. The tradition reaches for words like chaya, shadow, and treats the node as a point rather than a body: there is no disc to rise and set, only an intersection of two orbits that happens to be sensitive.

The other half of the coincidence is that Mars owns Ketu's first nakshatra. Ashwini falls entirely inside Aries, so a Moon there carries a Mars sign lord and a Ketu star lord together, and the older commentaries lean on that pairing when they describe the two as acting alike. It is worth holding lightly. Sharing a span and sharing a nakshatra do not make two lords interchangeable, and a reading that treats a Ketu period as a Mars period with different branding has stopped reading the chart.

Ashwini, Magha and Mula — the three doors into this period

Ketu's three nakshatras are spread evenly around the circle, one in each third: Ashwini at the opening of Aries, Magha at the opening of Leo, and Mula at the opening of Sagittarius. Each of the three begins a sign, which is unusual — most lords hold at least one asterism that straddles a boundary. The consequence is that a Moon anywhere in the first thirteen degrees and twenty minutes of a fire sign opens life under Ketu.

Two of the three sit at junctions the tradition treats carefully. Mula opens Sagittarius immediately after Jyeshtha closes Scorpio, and that water-to-fire seam is one of the gandanta points; Magha opens Leo after Ashlesha closes Cancer, another. A birth in the earliest minutes of either asterism is read with more caution than a birth in the middle of it, and since those minutes also determine the balance of the opening period, an imprecise birth time affects two things at once here rather than one.

How the seven years divide

The antardashas run through all nine lords in the same fixed order, beginning with Ketu itself, and each takes the share of the parent that its own allotment takes of a hundred and twenty. Ketu's own sub-period inside its mahadasha is therefore seven times seven over a hundred and twenty — a little under five months. Venus's, the longest, is twenty times seven over the same figure, or about fourteen months. The Sun's is barely four months.

That compression is the practical reason Ketu periods are read at the antardasha level rather than the mahadasha level. A seven-year block subdivided into nine parts produces sub-periods measured in months, and a further division into pratyantardashas produces stretches of weeks. Where a Saturn mahadasha can be discussed usefully as a whole, a Ketu mahadasha usually cannot; the useful unit is smaller than the period itself.

What the texts attribute to the south node's period

The classical material on Ketu is unusually consistent in one respect and unusually varied in another. Consistently, it associates the node with detachment, with endings that are not chosen, and with a turn away from accumulation — Parasara's treatment groups it with moksha rather than with the three worldly aims, and later compendia follow him. Variously, the specific results assigned to a Ketu period differ a great deal between authorities, more than they do for the seven physical grahas, which is what one would expect for a computed point with no body and no rulership of its own.

A reader working with a modern chart is best served by treating the period's placement as the operative fact rather than its reputation. Ketu's house, its dispositor, and whatever aspects reach it say more about how the seven years are structured than any general attribution can. The tradition itself models this: its rule that a node gives the results of the planets it associates with is an instruction to read the surroundings first, and it is the reason two Ketu periods in two charts can look nothing alike.

Which birth stars open a Ketu mahadasha

A Moon in any of these three nakshatras opens the sequence here:

Ashwini, Magha, Mula

Ketu mahadasha — common questions