Vimshottari Dasha
A 120-year sequence seeded by the Moon’s birth Nakshatra.
- The birth Nakshatra determines the starting Mahadasha lord.
- The Moon’s progress within that Nakshatra determines the balance remaining at birth.
- Dasha is a timing framework, not a deterministic event guarantee.
Vimshottari Dasha is a traditional 120-year planetary-period system. The sequence of nine lords is fixed, but the point where a person's timeline begins depends on the Moon's Nakshatra and its progress through that Nakshatra at birth.
That makes the Dasha calculation traceable. First calculate the birth Moon precisely, then determine its Nakshatra ruler and fractional progress. The remaining fraction of that ruler's Mahadasha becomes the balance at birth.
The nine-period sequence
The traditional sequence is Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn and Mercury, with fixed year lengths that sum to 120 years. A person's timeline does not necessarily begin at the start of the first Ketu period; it begins within the period ruled by the birth Nakshatra lord.
After the birth balance is exhausted, the sequence continues cyclically through the remaining Mahadashas. Each Mahadasha can be subdivided into Antardashas and deeper levels using the same proportional logic.
Birth balance matters
If the Moon has just entered its Nakshatra, most of that lord's Mahadasha remains. If it is near the end, only a small balance remains. Two people born under the same Nakshatra can therefore have different first-period end dates.
Date-convention details also matter over long timelines. AstroVedic360 documents its calendar handling rather than allowing progressive leap-year drift to accumulate silently.
How to use Dasha context
A Dasha identifies a traditional timing emphasis, not a guaranteed event. Interpretation should examine the Dasha lord's natal placement, house ownership, strength, aspects and relevant divisional context, together with current transits.
Nodes require special care because different traditions handle Rahu and Ketu through dispositors and associations. A software tool should not fabricate unsupported physical positions or strength values merely to fill a report.
Worked example: the same Nakshatra with a different balance
Suppose a Nakshatra is ruled by a planet with a 20-year Mahadasha. One birth occurs one-quarter of the way through the Nakshatra, leaving about three-quarters of the period, while another occurs near the end and leaves only a small fraction.
Both births share the same starting Mahadasha lord, but their first transition dates differ. This is why a Dasha timeline must use the Moon's degree, not only the Nakshatra name.
AstroVedic360 derives Vimshottari periods from the calculated birth Moon and discloses its date convention. Interpretive text is kept separate from the period arithmetic.
Read the full AstroVedic360 methodology →