Mithuna lagna · vimshottari
The Mercury Mahadasha for Gemini Ascendant
17 years · Mercury rules the 1st and 4th
The Parashari way to read a mahadasha for a given ascendant starts with the houses its lord holds. For Gemini ascendant Mercury rules the 1st (Gemini) and the 4th (Virgo), so for Gemini the 17-year Mercury mahadasha carries both a kendra and a trikona house and a kendra house.
Counted from Gemini, Mercury is exalted in the 4th (Virgo) and debilitated in the 10th (Pisces). Mercury is also Gemini’s lagna lord, so for this ascendant the Mercury mahadasha is the lagna lord’s own period. Mercury’s own nakshatras fall in Ashlesha (the 2nd), Jyeshtha (the 6th) and Revati (the 10th) for Gemini ascendant, which is where a birth that opens in the Mercury mahadasha has its Moon.
The Nine Sub-Periods, by Lordship for Gemini
| # | Antardasha | Length (classical) | Its lord rules, for Gemini |
|---|---|---|---|
| 1 | Mercury–Mercury | 2 years 4 months 27 days | the 1st and the 4th |
| 2 | Mercury–Ketu | 11 months 27 days | no house |
| 3 | Mercury–Venus | 2 years 10 months | the 5th and the 12th |
| 4 | Mercury–Sun | 10 months 6 days | the 3rd |
| 5 | Mercury–Moon | 1 year 5 months | the 2nd |
| 6 | Mercury–Mars | 11 months 27 days | the 6th and the 11th |
| 7 | Mercury–Rahu | 2 years 6 months 18 days | no house |
| 8 | Mercury–Jupiter | 2 years 3 months 6 days | the 7th and the 10th |
| 9 | Mercury–Saturn | 2 years 8 months 9 days | the 8th and the 9th |
For Gemini ascendant, three of the Mercury mahadasha’s sub-periods belong to lords of a dusthana (the 6th, 8th or 12th): Mercury–Venus, Mercury–Mars and Mercury–Saturn, and two to lords of a trikona other than the 1st: Mercury–Venus and Mercury–Saturn. The sub-period of Mercury, Gemini’s lagna lord, is Mercury–Mercury, the first of nine, 2 years 4 months 27 days long. Counted in time, sub-periods whose lords hold a dusthana for Gemini take 6 years 6 months 6 days (38%) of the Mercury mahadasha’s 17 years, and those whose lords hold a trikona other than the 1st take 5 years 6 months 9 days (33%); a lord holding both is counted in both. In the Mercury 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 Mercury mahadasha, not a forecast: where Mercury 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 Mercury mahadasha’s sub-period arithmetic, with the nine pratyantars of each, is on the Mercury mahadasha table; the Gemini chart house by house on the Gemini ascendant page. How the Mercury mahadasha is read in general is in our Mercury mahadasha article, and the system in Vimshottari dasha explained.