Ashtottari Dasha Explained

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Ashtottari means "one hundred and eight". It is the name of a dasha system whose full cycle lasts 108 years, against the 120 years of the better-known Vimshottari. Sage Parashara lists it among the conditional dashas, and it has long been popular in eastern India, particularly Bengal and Odisha, and in parts of Gujarat.

The eight planets and their years

Ashtottari uses eight planets. Ketu has no dasha. The order and lengths are:

Order	Planet	Years
1	Sun	6
2	Moon	15
3	Mars	8
4	Mercury	17
5	Saturn	10
6	Jupiter	19
7	Rahu	12
8	Venus	21

6 + 15 + 8 + 17 + 10 + 19 + 12 + 21 = 108 years.

Compared with Vimshottari, some planets get very different shares: the Moon rules 15 years (10 in Vimshottari), Saturn only 10 (19), and Rahu 12 (18).

Which birth stars start which dasha

The stars are counted from Ardra, and they are given to the planets in groups of four and three alternately. This scheme includes the 28th star, Abhijit, in Saturn's group.

Dasha at birth	Birth nakshatras
Sun (6)	Ardra, Punarvasu, Pushya, Ashlesha
Moon (15)	Magha, Purva Phalguni, Uttara Phalguni
Mars (8)	Hasta, Chitra, Swati, Vishakha
Mercury (17)	Anuradha, Jyeshtha, Mula
Saturn (10)	Purva Ashadha, Uttara Ashadha, Abhijit, Shravana
Jupiter (19)	Dhanishta, Shatabhisha, Purva Bhadrapada
Rahu (12)	Uttara Bhadrapada, Revati, Ashwini, Bharani
Venus (21)	Krittika, Rohini, Mrigashira

When does it apply?

This is the most discussed point about the system. Three views are common:

Parashara's condition. Use Ashtottari when Rahu is in a kendra (1st, 4th, 7th, 10th) or trikona (5th, 9th) counted from the Lagna lord, provided Rahu is not in the Lagna itself.
The fortnight condition. Use it for a daytime birth in the dark fortnight (Krishna paksha) or a night birth in the bright fortnight (Shukla paksha).
Regional custom. In some regions it is simply the system in use and is applied to every chart.

A sensible approach: treat Vimshottari as the main system, and give Ashtottari extra attention when one of the classical conditions is met.

Working out the balance at birth

A planet's years are shared equally among its stars. So each of the Sun's four stars carries 1.5 years, each of the Moon's three stars 5 years, each of Venus's three stars 7 years, and so on.

The balance at birth is the unfinished part of the birth star's share, plus the full shares of any later stars in the same group.

Example: Moon at 15°00' Taurus.

The star is Rohini, which runs from 10° to 23°20' of Taurus. The Moon has crossed 5° of 13°20', so 62.5% of Rohini remains.
Rohini belongs to Venus (21 years over Krittika, Rohini and Mrigashira: 7 years each).
Balance in Rohini = 7 x 0.625 = 4.375 years. Mrigashira, the next star in Venus's group, adds a full 7 years.
Balance of Venus dasha = 11.375 years = 11 years 4 months 15 days.
Then follow Sun (6), Moon (15), Mars (8), Mercury (17), Saturn (10), Jupiter (19) and Rahu (12).

The same Moon gives a very different first dasha in other systems: 6 years 3 months of Moon in Vimshottari, and 4 years 4 months 15 days of Siddha in Yogini Dasha. That is expected; each system divides time in its own way.

A note on Abhijit. For births in Uttara Ashadha, Abhijit or Shravana, the small Abhijit span at 6°40' to 10°53'20" of Capricorn changes the proportions, and different software handles it in slightly different ways. For those stars, rely on a program and compare its dates with life events before trusting them.

Sub-periods

Each dasha has eight sub-periods (antardashas), starting with the dasha lord's own and continuing in the same order.

Sub-period length = (dasha years x sub-period years) / 108, in years.

In the 21-year Venus dasha, for example:

Venus-Venus = 21 x 21 / 108 = 4.08 years, or 4 years 1 month.
Venus-Sun = 21 x 6 / 108 = 1.17 years, or 1 year 2 months.
Venus-Moon = 21 x 15 / 108 = 2.92 years, or 2 years 11 months.

How to read an Ashtottari period

The reading principles are the same as in any planetary dasha:

What the planet rules and where it sits. The houses a planet owns and occupies show the areas of life that become active.
Its strength. A planet in its own or exalted sign, or with good aspects, gives its results more smoothly; a weaker planet asks for more effort.
Dasha lord and sub-period lord together. Their mutual position and relationship shape each sub-period.
Agreement between systems. The practical value of a second dasha system is confirmation. When the Ashtottari period and the Vimshottari period both bring forward the same planet or the same houses, an astrologer can time events with more confidence.

No dasha, in any system, is "good" or "bad" by its name. Saturn's or Rahu's periods ask for patience and adaptability and are often the years in which lasting things are built.

Ashtottari and Vimshottari side by side

	Vimshottari	Ashtottari
Cycle	120 years	108 years
Planets	9	8 (no Ketu)
Stars per planet	3	3 or 4
Stars counted from	Krittika (Sun)	Ardra (Sun)
Uses Abhijit	No	Yes
Use	Universal	Conditional or regional

Summary

Ashtottari Dasha is a 108-year cycle of eight planets: Sun 6, Moon 15, Mars 8, Mercury 17, Saturn 10, Jupiter 19, Rahu 12 and Venus 21 years. The birth star, counted in groups from Ardra, fixes the first dasha, and the planet's years are shared equally among its stars to find the balance. Parashara applies it when Rahu is in a kendra or trikona from the Lagna lord; in practice it is most useful as a second opinion beside Vimshottari.

Frequently Asked Questions (FAQ)

What is Ashtottari Dasha?

It is a nakshatra-based dasha system with a cycle of 108 years shared among eight planets: Sun 6, Moon 15, Mars 8, Mercury 17, Saturn 10, Jupiter 19, Rahu 12 and Venus 21 years. Ketu has no period.

When is Ashtottari Dasha applicable?

Parashara gives a condition: Rahu in a kendra or trikona from the Lagna lord, but not in the Lagna. Another tradition applies it to day births in the dark fortnight and night births in the bright fortnight. In parts of eastern India it is used for all charts.

How is Ashtottari different from Vimshottari?

Vimshottari has 120 years and nine planets, with three stars per planet. Ashtottari has 108 years and eight planets, with three or four stars per planet, counted from Ardra and including Abhijit.

Which dasha system should I follow?

Vimshottari is the standard first choice for almost all astrologers. Ashtottari is best used as a supporting system, especially where its classical condition applies.