Vrishchika lagna · vimshottari
The Rahu Mahadasha for Scorpio Ascendant
18 years · Rahu rules no house
The Parashari way to read a mahadasha for a given ascendant starts with the houses its lord holds. For Scorpio ascendant Rahu holds none: the nodes rule no sign in whole-sign lordship, so the 18-year Rahu mahadasha for Scorpio is read through the lord of the sign Rahu occupies at birth, and through that sign’s house from Scorpio, which no table can supply without the chart.
Rahu is exalted on the commoner reckoning in Taurus, the 7th from Scorpio, and debilitated by the same reckoning in Scorpio, the 1st; planets.js records other signs as well. Rahu counts Mars, Scorpio’s lagna lord, an enemy; Mars’s own row names no node, so the reverse has no entry. Rahu’s own nakshatras fall in Ardra (the 8th), Swati (the 12th) and Shatabhisha (the 4th) for Scorpio ascendant, which is where a birth that opens in the Rahu mahadasha has its Moon.
The Nine Sub-Periods, by Lordship for Scorpio
| # | Antardasha | Length (classical) | Its lord rules, for Scorpio |
|---|---|---|---|
| 1 | Rahu–Rahu | 2 years 8 months 12 days | no house |
| 2 | Rahu–Jupiter | 2 years 4 months 24 days | the 2nd and the 5th |
| 3 | Rahu–Saturn | 2 years 10 months 6 days | the 3rd and the 4th |
| 4 | Rahu–Mercury | 2 years 6 months 18 days | the 8th and the 11th |
| 5 | Rahu–Ketu | 1 year 18 days | no house |
| 6 | Rahu–Venus | 3 years | the 7th and the 12th |
| 7 | Rahu–Sun | 10 months 24 days | the 10th |
| 8 | Rahu–Moon | 1 year 6 months | the 9th |
| 9 | Rahu–Mars | 1 year 18 days | the 1st and the 6th |
For Scorpio ascendant, three of the Rahu mahadasha’s sub-periods belong to lords of a dusthana (the 6th, 8th or 12th): Rahu–Mercury, Rahu–Venus and Rahu–Mars, and two to lords of a trikona other than the 1st: Rahu–Jupiter and Rahu–Moon. The sub-period of Mars, Scorpio’s lagna lord, is Rahu–Mars, the ninth of nine, 1 year 18 days long. Counted in time, sub-periods whose lords hold a dusthana for Scorpio take 6 years 7 months 6 days (37%) of the Rahu mahadasha’s 18 years, and those whose lords hold a trikona other than the 1st take 3 years 10 months 24 days (22%); a lord holding both is counted in both. In the Rahu mahadasha for Scorpio, the Rahu and Ketu sub-periods are read through their dispositors in the chart, since neither node rules a house.
For a Scorpio-rising chart this is the frame of the Rahu mahadasha, not a forecast: where Rahu and each sub-period lord actually sit, and their dignity there, decide what it comes to, and this page cannot know either.
Related
For Scorpio or any other ascendant, the Rahu mahadasha’s sub-period arithmetic, with the nine pratyantars of each, is on the Rahu mahadasha table; the Scorpio chart house by house on the Scorpio ascendant page. How the Rahu mahadasha is read in general is in our Rahu mahadasha article, and the system in Vimshottari dasha explained.