Mithuna lagna · vimshottari
The Ketu Mahadasha for Gemini Ascendant
7 years · Ketu rules no house
The Parashari way to read a mahadasha for a given ascendant starts with the houses its lord holds. For Gemini ascendant Ketu holds none: the nodes rule no sign in whole-sign lordship, so the 7-year Ketu mahadasha for Gemini is read through the lord of the sign Ketu occupies at birth, and through that sign’s house from Gemini, which no table can supply without the chart.
Ketu is exalted on the commoner reckoning in Scorpio, the 6th from Gemini, and debilitated by the same reckoning in Taurus, the 12th; planets.js records other signs as well. Ketu counts Mercury, Gemini’s lagna lord, neutral; Mercury’s own row names no node, so the reverse has no entry. Ketu’s own nakshatras fall in Ashwini (the 11th), Magha (the 3rd) and Mula (the 7th) for Gemini ascendant, which is where a birth that opens in the Ketu mahadasha has its Moon.
The Nine Sub-Periods, by Lordship for Gemini
| # | Antardasha | Length (classical) | Its lord rules, for Gemini |
|---|---|---|---|
| 1 | Ketu–Ketu | 4 months 27 days | no house |
| 2 | Ketu–Venus | 1 year 2 months | the 5th and the 12th |
| 3 | Ketu–Sun | 4 months 6 days | the 3rd |
| 4 | Ketu–Moon | 7 months | the 2nd |
| 5 | Ketu–Mars | 4 months 27 days | the 6th and the 11th |
| 6 | Ketu–Rahu | 1 year 18 days | no house |
| 7 | Ketu–Jupiter | 11 months 6 days | the 7th and the 10th |
| 8 | Ketu–Saturn | 1 year 1 month 9 days | the 8th and the 9th |
| 9 | Ketu–Mercury | 11 months 27 days | the 1st and the 4th |
For Gemini ascendant, three of the Ketu mahadasha’s sub-periods belong to lords of a dusthana (the 6th, 8th or 12th): Ketu–Venus, Ketu–Mars and Ketu–Saturn, and two to lords of a trikona other than the 1st: Ketu–Venus and Ketu–Saturn. The sub-period of Mercury, Gemini’s lagna lord, is Ketu–Mercury, the ninth of nine, 11 months 27 days long. Counted in time, sub-periods whose lords hold a dusthana for Gemini take 2 years 8 months 6 days (38%) of the Ketu mahadasha’s 7 years, and those whose lords hold a trikona other than the 1st take 2 years 3 months 9 days (33%); a lord holding both is counted in both. In the Ketu mahadasha for Gemini, the Rahu and Ketu sub-periods are read through their dispositors in the chart, since neither node rules a house.
For a Gemini-rising chart this is the frame of the Ketu mahadasha, not a forecast: where Ketu and each sub-period lord actually sit, and their dignity there, decide what it comes to, and this page cannot know either.
Related
For Gemini or any other ascendant, the Ketu mahadasha’s sub-period arithmetic, with the nine pratyantars of each, is on the Ketu mahadasha table; the Gemini chart house by house on the Gemini ascendant page. How the Ketu mahadasha is read in general is in our Ketu mahadasha article, and the system in Vimshottari dasha explained.