Rahu major period: 18 years of themes and subperiods
Rahu's major period has a standard length of 18 years. Below are the subperiod sequence, proportional durations and relevant assessment conditions.
In this article
Major-period lengths and the initial balance
In the standard 120-year Vimshottari sequence, Rahu receives 18 years. The birth lunar mansion determines the starting planet, and the proportion traversed within it determines the remaining balance of the first period. Life therefore often begins partway through a major period already underway.
Rahu's natal responsibilities, actual placement, condition and connections shape the specific themes of this period.
Period lord themes: inclination, amplification, and unfamiliar experience
Rahu is the ascending intersection of the Moon's orbit with the ecliptic. Readings consider its sign ruler, house and relevant connections to explore the unfamiliar territory being entered.
Rahu brings an unfamiliar area into focus. What you are exploring, how prepared you are, and support from the sign ruler and factors in the same sign shape the experience.
Rahu's house, sign ruler and same-sign relationships bring these themes into specific areas of life.
Rahu: sign ruler and actual connections
Rahu is a node and must be assessed through its house, sign ruler, planets in the same sign and other connections. Specified connections with angular or trinal lords may also allow it to participate in a Yoga. Traditions differ on nodal dignity; each reading will explain the basis used.
These supportive and impairing conditions may occur together. The reading uses the actual chart to explain which is more prominent for the question at hand.
The order and proportions of the nine subperiods
Antardashas begin with the mahadasha planet itself and continue in the fixed nine-planet sequence. Each duration equals the mahadasha years multiplied by the antardasha planet's standard years, divided by 120. The table below shows three decimal places.
Exact Gregorian start and end dates are determined jointly by the birth instant, the balance of the first period, and the year length. This site uses a Saura year of 365.2422 days for conversion.
| Antardasha planet | Duration derived from the standard year proportions |
|---|---|
| Rahu | 2.700 |
| Jupiter | 2.400 |
| Saturn | 2.850 |
| Mercury | 2.550 |
| Ketu | 1.050 |
| Venus | 3.000 |
| Sun | 0.900 |
| Moon | 1.500 |
| Mars | 1.050 |
How major periods and subperiods work together
The major period provides the stage’s background; subperiods add conditions for results to form, persist or change. Combined with divisional charts for the relevant areas, they offer a more specific view of opportunities, burdens and progress during this time.
A strong interest in an unfamiliar industry can encourage learning but also magnify unrealistic expectations. Existing preparation, actual costs, and reliable support influence the exploration process.
References
- VIMSHOTTARI Dasha Study Guide, pages 14–19; VD11 hierarchy; VD12 overall effects of each major period.
- Zodiac and lunar mansion conventions used on this site
- Cycles and year length: this site's Calc uses the Vimshottari sequence and a Saura year of 365.2422 days.
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