Planetary Periods

This is Part II, chapter 6 of Frawley's book — the working tool of Vedic predictive astrology. Where a Western chart leans on transits and progressions, Vedic astrology distributes a planet's effects across the lifetime through planetary periods (daśās). Frawley calls these "perhaps the most accurate system for showing how the planets distribute their effects through time and the different stages of our lives," and insists a Vedic reading "is not complete without them." We should each know which period we are in, because some periods differ so sharply from one another that "the whole nature of the destiny, health, or personality may change with them" (AoS ch.9, p192). [modern: Frawley]

What makes the daśā distinctive is that it needs no extra chart and not even transits to operate: the whole sequence of periods is already latent in the birth chart, computed from the position of the Moon at birth (AoS ch.9, p192).

The Vimśottarī Daśā — the 120-year cycle

Several daśā systems exist; the most common, and the one taught here, is Vimśottarī Daśā, "the 120-year cycle." In it the seven major planets plus the two lunar nodes (Rāhu and Ketu) each receive a major period of between 6 and 20 years. The total of all nine is 120 years — the system's notional full life-span (AoS ch.9, p192).

The periods run in a fixed cyclical order, with these lengths:

Order in cycle	Planet	Major-period length
1	Sun (Sūrya)	6 years
2	Moon (Candra)	10 years
3	Mars (Maṅgala)	7 years
4	Rāhu (north node)	18 years
5	Jupiter (Guru)	16 years
6	Saturn (Śani)	19 years
7	Mercury (Budha)	17 years
8	Ketu (south node)	7 years
9	Venus (Śukra)	20 years

This cyclical order is the same as the order of planetary rulership of the lunar constellations (nakṣatras) — and the periods are derived from those constellations, which is why they share an order (AoS ch.9, p192).

Frawley is candid that no rationale is given for the specific amounts. He notes that Rāhu, a mere shadow-planet, gets a far longer period (18 years) than substantial bodies like the Sun (6) and Moon (10). Reordered by length the periods are: Sun 6, Ketu 7, Mars 7, Moon 10, Jupiter 16, Mercury 17, Rāhu 18, Saturn 19, Venus 20. He spots a near-pattern — the four long periods (16, 17, 18, 19, 20) sum to 90, and the short ones (6, 7, 7, 10) to 30 — and remarks it "would be more logical if Mars were 8 years in its period and the Moon 9." But "even though we can't quite make sense of it, the system works quite well" (AoS ch.9, p192–193). [modern: Frawley]

How to determine the operating periods

We need the planet ruling the Major period (Mahā Daśā) and the planet ruling the Minor period (Bhukti Daśā) within it; the minor period can be divided into still smaller increments if wished (AoS ch.9, p193).

The method is purely from the Moon's position at birth:

1. Find the Moon's nakṣatra at birth. Each of the 27 lunar constellations spans 13° 20′ (= 800 minutes of arc). Frawley's worked example: the Moon at 12° 26′ Virgo falls in the constellation Hasta, which begins at 10° 00′ Virgo. Look up which planet rules that nakṣatra; here Hasta is ruled by the Moon. So the major period running at birth is the Moon's (AoS ch.9, p193).

2. Find how much of the nakṣatra remains to be travelled. The Moon has already passed 2° 26′ into Hasta, leaving 10° 54′ (= 654 minutes). Divide the remainder by 800 to get the fraction of the period still un-traversed: 654 ÷ 800 = 0.8175 (AoS ch.9, p193).

3. Convert to years, months, days. Multiply that fraction by the ruling planet's period length. Here the Moon's period is 10 years: 10 × 0.8175 = 8.175 years. The fractional part beyond whole years × 12 gives months (0.175 × 12 ≈ 2.1 months); the leftover month-fraction × 30 gives days (0.1 × 30 ≈ 3 days). So at birth, 8 years, 2 months, 3 days of the Moon's major period remain (AoS ch.9, p193).

4. Anchor it to the calendar. If birth is October 10, 1952, add 8 y 2 m 3 d: the Moon major period ends December 13, 1960. Every subsequent major period begins on the month-and-day that the first one ended. So Mars (7 years) runs from 12/13/1960, then Rāhu from 12/13/1967, and so on around the cycle. That ending date becomes "an important date in the year for us," since all later major periods begin on it in their respective years (AoS ch.9, p193).

Frawley adds that this hand method is approximate: a computer with detailed year-to-month and month-to-day tables will differ by a few days and is more accurate, "however, the periods are not that rigidly divided from each other and so this difference is seldom significant" (AoS ch.9, p193–194). [modern: Frawley]

The table of major and minor periods

The book prints a full Table of Planetary Periods giving, for each of the nine major periods, the length of every minor period (bhukti) inside it, listed as years/months/days. Within any major period the minor periods run in the same cyclical order, starting with the major lord itself: e.g. the Sun major period opens with a Sun–Sun bhukti, then Sun–Moon, Sun–Mars, and so on. The length of each minor period is proportional to the planet's share of the cycle, so a planet's bhukti inside its own major period is always the longest. The full table (AoS ch.9, p194–195):

1. Sun major period — 6 years · Sun 0y 3m 18d · Moon 0y 6m 0d · Mars 0y 4m 6d · Rāhu 0y 10m 24d · Jupiter 0y 9m 18d · Saturn 0y 11m 12d · Mercury 0y 10m 6d · Ketu 0y 4m 6d · Venus 1y 0m 0d.

2. Moon major period — 10 years · Moon 0y 10m 0d · Mars 0y 7m 0d · Rāhu 1y 6m 0d · Jupiter 1y 4m 0d · Saturn 1y 7m 0d · Mercury 1y 5m 0d · Ketu 0y 7m 0d · Venus 1y 8m 0d · Sun 0y 6m 0d.

3. Mars major period — 7 years · Mars 0y 4m 27d · Rāhu 1y 0m 18d · Jupiter 0y 11m 6d · Saturn 1y 1m 9d · Mercury 0y 11m 27d · Ketu 0y 4m 27d · Venus 1y 2m 0d · Sun 0y 4m 6d · Moon 0y 7m 0d.

4. Rāhu major period — 18 years · Rāhu 2y 8m 12d · Jupiter 2y 4m 24d · Saturn 2y 10m 6d · Mercury 2y 6m 18d · Ketu 1y 0m 18d · Venus 3y 0m 0d · Sun 0y 10m 24d · Moon 1y 6m 0d · Mars 1y 0m 18d.

5. Jupiter major period — 16 years · Jupiter 2y 1m 18d · Saturn 2y 6m 12d · Mercury 2y 3m 6d · Ketu 0y 11m 6d · Venus 2y 8m 0d · Sun 0y 9m 18d · Moon 1y 4m 0d · Mars 0y 11m 6d · Rāhu 2y 4m 24d.

6. Saturn major period — 19 years · Saturn 3y 0m 3d · Mercury 2y 8m 9d · Ketu 1y 1m 9d · Venus 3y 2m 0d · Sun 0y 11m 12d · Moon 1y 7m 0d · Mars 1y 1m 9d · Rāhu 2y 10m 6d · Jupiter 2y 6m 12d.

7. Mercury major period — 17 years · Mercury 2y 4m 27d · Ketu 0y 11m 27d · Venus 2y 10m 0d · Sun 0y 10m 6d · Moon 1y 5m 0d · Mars 0y 11m 27d · Rāhu 2y 6m 18d · Jupiter 2y 3m 6d · Saturn 2y 8m 9d.

8. Ketu major period — 7 years · Ketu 0y 4m 27d · Venus 1y 2m 0d · Sun 0y 4m 6d · Moon 0y 7m 0d · Mars 0y 4m 27d · Rāhu 1y 0m 18d · Jupiter 0y 11m 6d · Saturn 1y 1m 9d · Mercury 0y 11m 27d.

9. Venus major period — 20 years · Venus 3y 4m 0d · Sun 1y 0m 0d · Moon 1y 8m 0d · Mars 1y 2m 0d · Rāhu 3y 0m 0d · Jupiter 2y 8m 0d · Saturn 3y 2m 0d · Mercury 2y 10m 0d · Ketu 1y 2m 0d.

Note: these bhukti values are transcribed from the book's printed table (AoS p194–195) and verified cell-by-cell against the page image. The Ketu major period mirrors the Mars major period (both 7 years), and the inner pattern repeats accordingly.

How to use planetary periods — the four nested levels

The Vimśottarī life-cycle is 120 years. Most people do not live that long, "and difficult periods limit our lifespan." Periods falling after death are not wasted information: they "help us determine the nature of the after-life state, the sojourn in the astral plane." Time on the astral plane runs differently — more subtly — than on the physical, so if one dies during a negative period, the remainder of that period's influence colors the after-death state (AoS ch.9, p195). [traditional]

The periods nest four deep, each subdividing the one above by the same Vimśottarī proportions:

• Major period (Mahā Daśā) — 6 to 20 years, depending on the planet; average about 13 years.
• Minor period (Bhukti Daśā) — from 8 months to 2 years 3 months; average about 1½ years.
• Sub-minor period (Antar Daśā) — 30 to 90 days (1 to 3 months); average about 60 days. Obtained by dividing the minor period by fixed amounts, starting with the planet that rules the minor period. Frawley lists the divisors as: Sun 1/20, Moon 1/12, Mars 1/120, Rāhu 1/60, Jupiter 1/15, Saturn 1/120, Mercury 1/120, Ketu 1/120, Venus 1 (AoS ch.9, p195).

Note: the sub-minor divisors are heavily garbled in the OCR and only partly legible in the page image; the list above is the best reconstruction of the printed values and should be treated as approximate.

• Sub-sub-minor period (Sūkṣma Antar Daśā) — 3 to 10 days, averaging about a week; obtained by dividing the sub-minor periods by the same proportions (AoS ch.9, p196).

Frawley warns that these finest divisions demand an exact birth time: the birth must be accurate to one minute for confidence in the sub-sub-minor periods, "which is seldom the case, except by careful rectification." An error of two minutes can push the sub-sub-minor period off by nearly a whole period, so some astrologers de-emphasize that level. Moreover, the timing of the major periods themselves depends on the ayanāṁśa chosen: a one-degree difference in the ayanāṁśa can shift a major period by a year or more, which makes planetary periods "one of the best testing grounds for the different Ayanamshas" (AoS ch.9, p196). [modern: Frawley]

Background transits

Current transits should be read against the operating periods. The transits of the chart's strongest planet, or of the lord of the Ascendant, are always significant; one watches especially the transits of the period-ruling planets (major and minor lords) and the transits of other planets to those period lords. Frawley assigns these transits about one-third weight in judging a period's effects — the remaining two-thirds comes from the planets' natal positions and relationships in the birth chart. Strong transits matter most at the juncture between periods (AoS ch.9, p196). [modern: Frawley]

The level of period determines which transiting planets to watch:

• For minor periods, attend to the slow, distant planets — Jupiter, Saturn, Uranus, Neptune, Pluto — and the lunar nodes, since their effect can last up to a year.
• For sub-minor periods, attend to the faster, closer planets — Mars, Sun, Venus, Mercury — whose influence dispenses itself over a shorter span (AoS ch.9, p196).

Planetary returns

Returns of a planet to its natal position are read alongside transits and are "often the most important form of transits." The key returns are: monthly Lunar returns, yearly Solar returns, the 12–13 year Jupiter return, the 18–19 year nodal (Rāhu/Ketu) return, and the 29-year Saturn return. Most important of all are the returns of the major and minor period lords; a chart can be cast for the moment of such a return and compared with the birth chart to read the period's effects (AoS ch.9, p196). [traditional]

Use of period lords

Reading a period rests on house-rulership and the temporal status of planets developed earlier in the book. The major lord delivers the results of the houses it rules and of the houses and house-lords it aspects. It is treated as casting an aspect toward all planets and houses, but doubly toward those it actually aspects in the birth chart (AoS ch.9, p197).

The minor lord likewise casts its aspects, and the single most important thing is the relationship between the major and minor lords: whatever relationship they hold in the birth chart is magnified during the combined period, with the major lord generally taken to aspect (and so modify) the minor lord (AoS ch.9, p197).

A subtle but practical rule: even if the two lords share no aspect in the birth chart, their influences combine as if they did during the joint period — though less strongly than a real natal aspect. Frawley's example: if Jupiter and Venus are both well-placed natally but un-aspected, the Jupiter-major / Venus-minor period still brings out many effects of a Jupiter–Venus aspect (AoS ch.9, p197). [modern: Frawley]

Beyond aspects, weigh house relationships and friendship/enmity between the period lords:

• Lords standing in inauspicious houses from each other — the sixth, eighth, or twelfth — do not work well together.
• Lords in auspicious houses from each other — trines or quadrants — give good effects even without a mutual aspect.
• Friendly planets give better results as period lords; inimical ones cause difficulty even when each is individually auspicious for the chart. These factors are weighed and synthesized to fine-tune the reading (AoS ch.9, p197).

The sub-minor lord in turn makes aspects and relationships with the major and minor lords (and reinforces any natal ones), modulating the effects of the minor lord (AoS ch.9, p197).

How to determine favorable periods

The general rule: the most favorable times come when the major, minor, and sub-minor lords are all benefic in nature and are different planets. Next best is when all are benefic but one repeats (still no malefics in the sequence) (AoS ch.9, p197).

Of similar quality is a time when all the period lords rule the same domain of life — since a single group of planets is rarely benefic for all domains. When the lords of the 9th, 11th, 2nd, or 5th houses combine, the time is naturally good for business and income; conversely, when the lords of the 6th, 8th, 12th, or 3rd combine, disease or difficulty grows more likely (AoS ch.9, p198).

The onset of a benefic planet's major period is particularly auspicious, because the very first minor, sub-minor, and sub-sub-minor periods inside it are ruled by that same benefic. That opening is a good time to set the goals to be pursued across the whole major period — though "a good planetary period does not always give its results immediately"; early on the seeds appear, not yet the fruit. Likewise, when a minor period begins, its first sub-minor is ruled by the same planet, a favorable window for the minor lord's affairs that harmonize with the major lord (AoS ch.9, p198).

The opening of a period — major or minor especially — is also the right time for remedial measures that balance a difficult period lord: gems, mantras, deity worship, ritual. If a period lord is benefic but weak, strengthen it with its gem; if malefic, propitiate it by mantra, ritual, or worship — or, alternatively, strengthen the benefic lord of the period that contains it. Frawley's example: a negative Saturn minor period opening inside a positive Jupiter major period can be handled either by propitiating Saturn or by strengthening Jupiter (AoS ch.9, p198). [traditional]

Among the period rulers, the major lord weighs most in setting the general character of the time, then the minor, sub-minor, and sub-sub-minor lords in that order. Two illustrations (AoS ch.9, p198):

• Major lord rules the 2nd (livelihood), minor the 11th (income), sub-minor the 9th (fortune) → material gain is likely.
• Major lord rules the 9th (religion), minor the 5th (intelligence), sub-minor the 2nd (intellect/speech) → favorable for communicating spiritual, religious, or legal principles.

The natural status of the planets must still be folded in: if the major lord rules the 6th, the minor the 8th, and the sub-minor is a temporally benefic but naturally malefic Saturn, Saturn's natural malefic nature may well surface alongside the difficult tenor of the dominant lords (AoS ch.9, p198).

Determination of favorable times (electional use)

Once a period with favorable major, minor, and sub-minor lords is found, narrow down: look within it for a day when the Moon and the day-lord are also favorable; then a time on that day when the Ascendant and the Navāṁśa Ascendant are favorable — yielding "a most excellent time for a particular venture"; and lastly, if possible, pick a favorable hourly lord (AoS ch.9, p199).

The nature of the venture sets which factors to emphasize. For spiritual initiation, the 9th house, its lord, Jupiter, and the Ātmakāraka matter most. For a partnership (or marriage), both individuals' charts must be examined and a day good in both found, which may involve compromise — aiming for the best possible day within the required window (a month, several months, whatever the venture needs) (AoS ch.9, p199).

Frawley stresses that this is not meant to enslave us to the ephemeris daily or weekly. A monthly examination is helpful, a yearly one good for most people; the purpose "is not to make us slaves to time and the planets but to increase our perception of the forces at work in our lives," reserved mainly for important decisions and changes — and also useful for choosing good times for rituals such as pūjās, homas, and meditation (AoS ch.9, p199). [modern: Frawley]

Planetary hours

Each planet governs certain hours of the day and gives its main results then: auspicious natal planets give good results in their hours, inauspicious ones cause difficulty, following all the general rules. The effect compounds with the favorable or unfavorable nature of the day-ruling planet (the Sun for Sunday, etc.) and its relationship to the hour-ruling planet; the Moon's disposition and the nature of the Ascendant at the time also count (AoS ch.9, p199).

Each planetary hour runs from its beginning to its end. The planet ruling the day starts off the hourly sequence at apparent sunrise (consult tables or software for the exact sunrise), and the hours then proceed in the Chaldean order from slowest to fastest planet: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon, repeating through the 24 hours (AoS ch.9, p199–200). [traditional]

The book prints the full 24-hour grid of hour-lords for each weekday. Because the day-lord opens its own day at sunrise, each day starts on a different planet: Sunday's first hour is the Sun, Monday's the Moon, Tuesday's Mars, Wednesday's Mercury, Thursday's Jupiter, Friday's Venus, Saturday's Saturn — and from there the Saturn→Moon sequence cycles. The first twelve hours of each weekday (AoS ch.9, p200):

Hour	Sun.	Mon.	Tue.	Wed.	Thu.	Fri.	Sat.
1	Sun	Moon	Mars	Mercury	Jupiter	Venus	Saturn
2	Venus	Saturn	Sun	Moon	Mars	Mercury	Jupiter
3	Mercury	Jupiter	Venus	Saturn	Sun	Moon	Mars
4	Moon	Mars	Mercury	Jupiter	Venus	Saturn	Sun
5	Saturn	Sun	Moon	Mars	Mercury	Jupiter	Venus
6	Jupiter	Venus	Saturn	Sun	Moon	Mars	Mercury
7	Mars	Mercury	Jupiter	Venus	Saturn	Sun	Moon
8	Sun	Moon	Mars	Mercury	Jupiter	Venus	Saturn
9	Venus	Saturn	Sun	Moon	Mars	Mercury	Jupiter
10	Mercury	Jupiter	Venus	Saturn	Sun	Moon	Mars
11	Moon	Mars	Mercury	Jupiter	Venus	Saturn	Sun
12	Saturn	Sun	Moon	Mars	Mercury	Jupiter	Venus

The grid continues for hours 13–24, simply repeating the same Saturn→Moon cadence, so that hour 25 (the next sunrise) again lands on the following day's lord (AoS ch.9, p200).

Note: the printed table covers all 24 hours for each weekday; the hours 1–12 above were verified cell-by-cell against the page image (AoS p200). They follow exactly the rule the text states — each weekday opens on its own day-lord at sunrise, after which the hours run in the Chaldean order Saturn → Jupiter → Mars → Sun → Venus → Mercury → Moon.

Horary astrology

A chart can be cast for any significant moment, not only for birth: marriages, the moment of death, the founding of a business, a move — "for charting the course of anything." This branch is horary astrology, and the chart so cast is a horary chart (AoS ch.9, p200).

An astrologer may erect a chart for the very moment a client is seen, which helps predict the issues that matter in that reading. More commonly the client arrives with a specific question — how their health will go, whether to move — and the moment the question is put to the astrologer becomes the time for the chart, which is then read to see how that issue will unfold (AoS ch.9, p200–201).

The premise is that "nothing in life is without meaning or is entirely coincidental"; every event follows cosmic law and can be read from the prevailing planetary positions. With computers, casting charts for many life-conditions is easy, so it is worth doing for important moments — and worth staying aware of current planetary positions generally, since they affect everyone individually and collectively. The astrologer is thus called either to judge the course of events already begun at a certain time, or to elect an auspicious time to begin an enterprise, aiding "attunement to cosmic law" (AoS ch.9, p201).

Horary examples and rules:

• In marriage, a horary chart for the time of the marriage "may be as important as comparing the birth charts of the couple."
• A chart for someone's moment of death usually indicates their next life; charts for the time of accidents or onset of serious illness help with prognosis (AoS ch.9, p201).

Horary charts are interpreted like birth charts, except that the practical issue, not a person, is what is read. A marriage question makes the 7th house, its lord, and significator primary; a business question (e.g. the stock market) directs attention to the 5th, 9th, and 11th houses, their lords, and significators. The same principles as the birth chart apply, and even the planetary periods can be used to trace a particular issue's development through time. Frawley closes by noting that in Vedic astrology, astrologers in fact do more of this horary/attunement work than plain birth-chart reading — yet the birth chart remains the foundation, and once it is understood "we have not reached the end of astrology"; there is "unlimited ground for exploring the ramifications of the birth chart through such horary and attunement methods" (AoS ch.9, p201). [modern: Frawley]