Moon Mahadasha: the ten-year Chandra dasha, read from the classical texts

The Moon Mahadasha is the ten-year period of the Vimshottari dasha system ruled by Chandra. It follows the six-year Sun period and is followed by the seven-year Mars period. Most of what is written about it online is a list of moods: emotional, nurturing, restless. The classical texts do something more useful. They state conditions. Brihat Parashara Hora Shastra (BPHS) gives one set of results for a Moon that is strong and well placed, a different set for one that is waning, debilitated or in a difficult house, and then a third layer for each of the nine sub-periods. This page sets those conditions out in order, with the chapter and sloka for each, and shows where this app's Vimshottari Dasha calculator and Kundali apply them and where they deliberately stop short.

Where the ten years come from

BPHS Ch. 46 lists many dasha systems and singles out one. Slokas 2-5 call Vimshottari "the most appropriate for the general populace", and Slokas 12-14 give the reason: the natural span of human life is taken as 120 years, and the nine periods add up to exactly that. Sloka 15 gives the lengths in order from the Sun: 6, 10, 7, 18, 16, 19, 17, 7 and 20 years for the Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, Ketu and Venus. The Moon's share is ten years, one twelfth of the whole cycle. If the idea of a Mahadasha is new to you, What a Mahadasha actually is covers the basics before you go further here.

The same figures sit in this app's engine as one table, DASHA_SEQUENCE in astrologyEngine.js, entered from Ketu: Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. The order never changes, so the Moon period always follows the Sun's and always hands over to Mars.

When the Moon dasha falls in a life

Which period you are born into depends on one thing: the nakshatra the Moon occupied at birth. BPHS Ch. 46 Sl. 12-14 counts the lords from Krittika in the order Sun, Moon, Mars, Rahu, Jupiter, Saturn, Mercury, Ketu, Venus, repeating three times round the 27 nakshatras. The engine does the same count from Ashwini: it takes the nakshatra's index, finds the remainder after dividing by nine, and uses that as the position in the cycle. Both routes give the Moon three nakshatras: Rohini, Hasta and Shravana. If your birth nakshatra is one of those three, you were born in the Moon Mahadasha.

You were not, however, born with the full ten years ahead of you. Sloka 16 gives the rule for the balance: multiply the dasha's length by the portion of the nakshatra the Moon had already crossed, divide by the whole nakshatra, and subtract the result from the full period. The engine's vimshottariTimeline() applies exactly that. A nakshatra is 13 degrees 20 minutes wide; a Moon that has covered a quarter of Rohini leaves seven and a half years of Moon dasha, and a Moon in the last degree of Hasta leaves only a few months. This is the one place in the whole timeline where the first period is shortened. Every later period runs its full length.

For everyone else the Moon dasha arrives later, and the age at which it arrives is fixed by the periods standing between the birth lord and the Moon. Adding the Sloka 15 figures in sequence order gives the range below. The earlier age applies to someone born at the very end of their birth nakshatra, the later age to someone born at its very start.

The table makes a point that generic descriptions skip. A Moon dasha lived between birth and age six is a different experience from one lived between 40 and 50, simply because of what a person can do at those ages. One of this app's sources says as much: a case study in Advanced Predictive Astrology remarks that when the chart has a Gaja Kesari yoga, or a fifth-ninth relationship between Jupiter and the Moon, the Moon's dasa "generates better results" if it is enjoyed between the ages of 21 and 65. That is one modern author's working rule, not a sloka, and it is quoted here as such. Because the starting point depends on the Moon's exact longitude, a small error in birth time moves every date; the Moon sign and nakshatra article and what an unknown birth time costs explain how large that movement can be.

What BPHS says the Moon dasha gives

BPHS Ch. 47 opens with a distinction that governs everything after it. Sloka 2 says dasha effects are of two kinds, general and distinctive: the general effects come from the natural characteristics of the graha, and the distinctive ones are "realized by their placements". Sloka 3 adds that the effects are in accordance with the graha's strength. So the text does not hand out one description of the Moon dasha. It hands out a favourable reading, an unfavourable reading, and the conditions that select between them.

The favourable reading (Ch. 47 Sl. 16-22)

Parashara's list of good results for the Moon dasha, running "from its commencement to the end", is: opulence and glory, good fortune, gain of wealth, auspicious functions at home, the dawn of fortune, attainment of a high position in government, acquisition of conveyances and clothes, birth of children and acquisition of cattle. The idiom is that of an agrarian kingdom. Read for its categories rather than its nouns, the list is about household prosperity, standing with authority and growth of the family. The conditions attached to it are specific:

• The Moon is in her exaltation sign or her own sign. In this app's dignity table that is Taurus for exaltation and Cancer for own sign.
• Or she is in a Kendra (the 1st, 4th, 7th or 10th house), or in Labha (11th), Dharma (9th) or Putra (5th).
• She is associated with, or aspected by, benefics.
• She is "fully powerful".
• She is associated with the lord of Karma (10th), Dharma (9th) or Bandhu (4th).

The passage closes with one extra line: if such a Moon is in Dhana Bhava, the 2nd house, there will be "extraordinary gains of wealth and luxuries". That is a single placement singled out by the text, and it is the reason the page on the Moon in the 2nd house is worth reading alongside this one if that is where your Moon sits.

The unfavourable reading (Ch. 47 Sl. 23-26)

The other side is given in five separate statements, and it pays to keep them separate because they are not the same condition.

1. 1.A Moon that is waning, or in her debilitation sign, brings loss of wealth in her dasha.
2. 2.A Moon in Sahaja, the 3rd house, brings "happiness off and on".
3. 3.A Moon associated with malefics brings mental tension, trouble from employees and from the mother, and loss of wealth. The translation also uses the word "idiocy"; the sense is of a clouded mind, and the text is describing a period, not labelling a person.
4. 4.A waning Moon in Ari, Randhra or Vyaya (the 6th, 8th or 12th house), or one associated with malefics, brings inimical relations with government, loss of wealth and distress to the mother.
5. 5.A strong Moon placed in the 6th, 8th or 12th brings "troubles and good times off and on".

The general test for any dasha lord

Ch. 47 Sl. 5-6 states the test in its shortest form, for every graha: the effects are favourable if the dasha lord is in the Lagna, in exaltation, in its own sign or in a friendly sign, and unfavourable if it is in the 6th, 8th or 12th, in debilitation or in an enemy's sign. Ch. 48 Sl. 1 repeats it and draws the conclusion that a natural malefic that is exalted in a good house will not give bad results, while a natural benefic that is debilitated in a bad house will. The Moon is counted a benefic when she is strong, and this sloka is the reason that reputation does not settle the question on its own.

A second classical voice: Saravali

Kalyana Varma's Saravali, Ch. 41, also describes a favourable and an adverse Moon's dasa. It must be read with a caveat: that chapter is about Moola Dasa, a different scheme in which period lengths come from a longevity calculation, not from the nakshatra. The descriptions of what a graha's period feels like are still descriptions of the graha, and they are useful as a second witness, but they are not statements about Vimshottari dates.

For a favourable Moon, Sl. 29-30 list gains through female association, a soft disposition, journeys, and a run of items linked to water and sweetness: water, ice, milk, juice, jaggery, sugar, flowers, robes and sweet food. The passage adds success in undertakings through one's own intelligence, honours from elders and from the king, and increased courage and wisdom. For an adverse Moon, Sl. 31-32 list fear within the family, misunderstanding with family members, difficulties, loss of wealth, enmity with the royal assembly, sleep, indolence and grief.

Saravali Ch. 41 also supplies three refinements that apply to any period. Sl. 22-24 grade the result by strength: an exalted graha gives the best results, one in its own sign, Moolatrikona or own Navamsa gives moderately good ones, and one in a friendly sign gives feebly good ones. Sl. 19 warns that a graha in a friendly sign which falls in an enemy's Navamsa, or is in fall in the Navamsa, gives mixed effects, which is the classical reason to look at the Navamsa (D9) before trusting a sign-level verdict. And Sl. 9 gives the Moon a role in every dasha, not only her own: the Sun is called the ripener of a dasa's effects and the Moon the sustaining agent, which is why Sl. 15-18 ask where the Moon is transiting, and what aspects her, on the day any period begins.

How this app applies the test

In the Kundali, the note under the current Mahadasha comes from a function called buildDashaLordEffects() in kundaliEngine.js. It applies the Ch. 47 Sl. 5-6 test to your own chart, using the Moon's dignity and house as computed for you. It is worth knowing exactly what it checks, because it is narrower than the full classical list. You can see the same inputs yourself in the birth chart calculator and the Kundali feature.

• Dignity. The engine labels the Moon Exalted anywhere in Taurus, Own sign in Cancer, Debilitated in Scorpio, and otherwise Friendly, Neutral or Enemy according to her relation with the lord of the sign she is in. That relation combines the natural friendship table with the temporary one read from where the two grahas sit in your chart.
• House. The 6th, 8th and 12th are the dusthana set, matching the Ari, Randhra and Vyaya of the slokas.
• Verdict. The placement is read as favourable when the Moon is exalted, in Moolatrikona, in her own sign or in a friendly sign, or is in the 1st house, and is not debilitated, not in an enemy sign and not in a dusthana. Anything else is read as "a more testing placement".
• Three-tier quality. A second function, dashaQuality(), keeps the middle open: challenging if the Moon is debilitated, in an enemy sign or in a dusthana; good if exalted, Moolatrikona or own sign; neutral otherwise.

The sentence you see is built from those facts. For the favourable side the engine's theme text is "emotional steadiness, domestic good fortune and a rise in standing at home and publicly"; for the testing side it is "restlessness, financial ups and downs and strain with mother figures". Both are compressions of Ch. 47 Sl. 16-26. The sentence always carries the words "classically read as", which marks the claim as the tradition's and not a prediction by the software.

One more number is worth looking at. The verdict uses the sign-based dignity ladder, but the app also computes a fuller strength measure for each graha. The Shad Bala calculator ranks your grahas by that measure, and BPHS Ch. 47 Sl. 3 says plainly that dasha effects follow strength. A Moon near the bottom of your own ranking is, on Parashara's terms, a Moon whose decade promises less in either direction.

The house the Moon rules for your Ascendant

BPHS Ch. 48 adds a second lens. Its title is "Distinctive Effects of the Nakshatr Dasha, or of the Dashas of the Lords of various Bhavas", and its point is that the area of life a dasha touches comes from the house its lord rules, not only from the graha's nature. The Moon owns a single sign, Cancer, so for each Ascendant she rules exactly one house. Find your Ascendant with the Lagna calculator, then read across.

The table has to be read with two qualifications that come from the same chapter. First, the source uses stark language for the dashas of the 2nd, 7th and 8th lords, speaking of the possibility of death. This app does not carry that language anywhere. The engine's own comment records the decision: those three entries are paraphrased as financial, relationship and transformational strain, in line with the standing exclusion of lifespan content. The table above follows the engine.

Second, Sl. 14-17 give the exceptions that rescue a difficult lordship. The dasha of a 6th, 8th or 12th lord becomes favourable if that graha is associated with the lord of a trikona (the 1st, 5th or 9th). A dasha lord aspected by a kendra or trikona lord is also favourable. And if the 9th lord is in the Lagna while the Lagna lord is in the 9th, both their dashas are called extremely beneficial; the same exchange between the 10th lord and the Lagna lord is given the highest result in the passage. For Aquarius, Sagittarius and Leo Ascendants, where the Moon rules a dusthana, these are the slokas to check before accepting the plain reading.

Lordship says which house the Moon speaks for; occupancy says where she actually sits. The two are separate facts and both matter. For the placement itself, the house pages take each position in turn: 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th and 12th. The graha herself, her nature and her relationships are covered in the Moon in Vedic astrology.

When within the ten years: the Dreshkana rule

BPHS Ch. 47 Sl. 3-4 gives a timing rule that is rarely repeated. A sign divides into three Dreshkanas of ten degrees each. The effects of a graha in the first Dreshkana are realised at the commencement of its dasha, those of a graha in the second are felt in the middle, and those of a graha in the third are experienced at the end. For a retrograde graha the order reverses, and the text notes that Rahu and Ketu, always retrograde, always reverse. The Moon is never retrograde, so for her the rule runs forward without exception: a Moon at 4 degrees of her sign points to the opening years, one at 15 degrees to the middle, one at 26 degrees to the close.

The nine antardashas inside the Moon dasha

BPHS Ch. 51 Sl. 1 gives the arithmetic: multiply the dasha years of the main lord by those of the sub-lord and divide by 120. Sl. 2 gives the order: the first antardasha belongs to the dasha lord, and the rest follow the usual sequence. Inside a ten-year dasha the product is unusually tidy, since ten times a graha's years divided by 120 is that many months. Each sub-period in the Moon dasha lasts one month for every year of the sub-lord's own Mahadasha. The engine uses the same proportion on your real start and end dates, so that the nine parts sum exactly to the whole. For the mechanics of all three levels, see Antardasha and Pratyantardasha.

Ch. 53 is devoted entirely to these nine. Its structure is the same for each: a favourable result if the sub-lord is strong and well placed from the Lagna, an unfavourable one if it is weak or in a dusthana, and then a further test that is new at this level, the sub-lord's position counted from the dasha lord. In this chapter the dasha lord is the Moon, so that second count is taken from the sign your natal Moon occupies. The summaries below report what the text says. The chapter also names a ritual or charitable act after each sub-period; this app does not prescribe remedies, and those lines are left out.

Moon-Moon (Sl. 1-6)

The opening ten months restate the dasha test in miniature. Favourable results, described as devotion to deities and one's teacher, extreme happiness, name and fame, follow if the Moon is exalted, in her own sign, in a kendra or trikona, or associated with the 9th or 10th lord. Loss of wealth and position, lethargy, friction with those in authority and distress to the mother follow if she is debilitated, associated with malefics, or in the 6th, 8th or 12th. The text adds bodily pain where the Moon rules the 2nd or 7th or is joined to the 8th or 12th lord.

Moon-Mars (Sl. 7-12)

With Mars in a kendra or trikona: advancement of fortune, recognition by government, success in efforts, growth in agricultural production, prosperity at home and profit in business, with great happiness if Mars is exalted or in his own sign. With Mars in the 6th, 8th or 12th from the Lagna, or afflicted in the 6th, 8th or 12th from the Moon: losses at home and in business, adverse relations with employees and with authority, separation from kin and a hot temper. The seven-year period that follows the Moon's is covered in Mars Mahadasha.

Moon-Rahu (Sl. 13-21)

This is the one sub-period where the text reverses its usual logic. Rahu in a kendra or trikona gives some auspicious results at the start, followed by danger, loss of reputation and mental agony. The good results, success in all ventures, come when Rahu is aspected by benefics, is in the 3rd, 6th, 10th or 11th house, or is joined to a Yoga Karaka graha. Counted from the Moon, Rahu in a kendra, a trikona, the 3rd or the 11th is read as pilgrimage and charitable inclination; a weak Rahu in the 8th or 12th from her is read as loss of position and distress to the family. Rahu Mahadasha treats the node at full length.

Moon-Jupiter (Sl. 22-31)

Jupiter in a kendra or trikona from the Lagna, or in his own or exaltation sign, gives the strongest list in the chapter: auspicious celebrations at home, recognition, gains of wealth, land and conveyances, success in all ventures. Jupiter in the 6th, 8th or 12th, combust, debilitated or with malefics gives loss of position, quarrels and loss of house and land. From the Moon, Jupiter in the 3rd or 11th is favourable, while a weak Jupiter in the 6th, 8th or 12th from her gives journeys away from home, with good effects at the start and distress at the end. Whether your chart has Gaj Kesari - Jupiter in a kendra from the Lagna or the Moon, with a benefic joining or aspecting it - is something the yogas calculator checks; Jupiter Mahadasha covers the graha's own period.

Moon-Saturn (Sl. 32-38)

The longest but one of the nine. Saturn in a kendra or trikona from the Lagna, in his own or exaltation sign or own Navamsa, aspected by or joined to benefics, or strong in the 11th, gives friendship, gain of wealth and property, profit in business and growth in agricultural production. Saturn in the 6th, 8th, 12th or 2nd, or debilitated, gives visits to holy places together with trouble created by many people and distress from enemies. The count from the Moon produces a deliberately mixed line: Saturn in a kendra or trikona from her gives enjoyment and gains at some times and quarrels at home at others. See Saturn Mahadasha for the graha in his own right.

Moon-Mercury (Sl. 39-46)

Mercury strong in a kendra or trikona, or in his own or exaltation sign: acquisition of wealth, recognition, discussion of the shastras, knowledge gained in learned company, profit in business. Mercury in a kendra, a trikona, the 11th or the 2nd from the Moon adds marriage, charitable and religious acts, and contact with learned people. Mercury in the 6th, 8th or 12th from the Moon, or debilitated: loss in agricultural ventures and distress in the household. Mercury Mahadasha is the companion page.

Moon-Ketu (Sl. 47-52)

A strong Ketu in a kendra, a trikona or the 3rd gives gain of wealth, enjoyment and religious inclination, with a note on sequence: some loss of wealth at the start, then all is well. Ketu in a kendra, the 5th, 9th or 11th from the Moon gives gain, with a loss at the end. Ketu in the 8th or 12th from the Moon, or afflicted by malefics, gives obstacles in ventures through interference and quarrels. Ketu Mahadasha covers the south node's period.

Moon-Venus (Sl. 53-64)

The longest sub-period at twenty months, and the most detailed passage. Venus in a kendra, a trikona, the 11th, 4th or 9th, or in his own or exaltation sign: gains of clothes, ornaments and conveyances, happiness to spouse and children, construction of a new house, sound health. Venus conjunct the Moon adds good reputation and more land and houses (Sl. 56). Venus debilitated, combust or afflicted: loss of landed property and opposition from government. Venus strong in the 2nd, or with the 11th lord, is given a line about hidden treasure and gain of land. From the Moon, a kendra or trikona position is favourable and the 6th, 8th or 12th is not. Venus Mahadasha continues the subject.

Moon-Sun (Sl. 65-70)

The closing six months. The Sun in exaltation or his own sign, in a kendra, or in the 5th, 9th, 11th, 2nd or 3rd: recovery of lost position and wealth, happiness in the family, acquisition of land with the help of friends and authority. The text notes a likelihood of fever and lethargy at the very end of the sub-period, and troubles in foreign journeys if the Sun is in the 8th or 12th from the Moon. Those are the text's associations and are not medical advice. The period before the Moon's is described in Sun Mahadasha.

The third level: pratyantardasha

BPHS Ch. 61 Sl. 1 repeats the same proportion one level down, and the engine's pratyantardashas() uses the same subdivision function as the level above. The Moon's own pratyantar inside Moon-Moon is ten months times 10 over 120, a little over 25 days. The longest third-level slice in the whole dasha, Venus inside Moon-Venus, is twenty months times 20 over 120, about 100 days. This is the scale at which a period becomes something a person can actually plan around.

Sl. 11-17 list the pratyantars inside the Moon's antardasha, and Sl. 2 tells the reader how to treat every such list: they are general effects, and the inauspicious ones "will not be produced" if the graha is in a trikona, rules an auspicious house, or is in a benefic division.

Transits during a Moon dasha

A dasha says whose themes are in the foreground; transits say what is passing over the chart meanwhile. The two are separate calculations and this app keeps them separate. In classical gochara every transit is counted from the natal Moon's sign, which the Moon sign calculator gives you and the gochar calculator applies to today's positions. Saturn's passage through the 12th, 1st and 2nd signs from the natal Moon is Sade Sati, computed by the Sade Sati calculator. None of the dasha chapters used on this page says that Sade Sati changes the Moon dasha, and this page does not claim it. What can be said is narrower: both are read from the same point in the chart, so a person in a Moon dasha who is also in Sade Sati has two independent classical statements about the natal Moon active at once.

BPHS Ch. 48 Sl. 5-8 adds that a graha's placement at birth and at the commencement of the dasha "should both be taken into account". This app does not compute a chart for the dasha's first day; the start date is shown in the Timing feature, and that check remains manual.

Checking it in your own chart

1. 1.Get the dates. Run the Vimshottari Dasha calculator with your birth date, time and place. Note the start and end of the Moon period and whether it is the shortened first period.
2. 2.Note the Moon's sign and its dignity label: Exalted, Own sign, Friendly, Neutral, Enemy or Debilitated.
3. 3.Note the Moon's house. Kendra (1, 4, 7, 10), trikona (5, 9), 11th and 2nd are named in the favourable sloka; 6, 8 and 12 in the unfavourable ones; the 3rd is "off and on".
4. 4.Check the phase at birth. Waxing or waning is a condition in Ch. 47 Sl. 23 that the app's dasha verdict does not include.
5. 5.Look at what shares the Moon's sign or aspects her. Benefic association supports the favourable reading (Sl. 16-22); malefic association is one of the five unfavourable statements.
6. 6.Find the house Cancer falls in for your Ascendant and read the Ch. 48 theme, then check whether the Moon is joined to a trikona lord if that house is the 6th, 8th or 12th.
7. 7.Open the Navamsa and see whether the Moon keeps her dignity there, following Saravali Ch. 41 Sl. 19. The article on the Navamsa as the second chart explains why this needs an accurate birth time.
8. 8.For the current antardasha, count the sub-lord's sign from the Moon's sign and compare with the Ch. 53 summary above.

BPHS also describes other nakshatra-based systems for particular charts; the alternate dashas calculator shows those, with different lengths for the Moon.

Common misreadings

• "The Moon is a benefic, so her dasha is good." BPHS Ch. 48 Sl. 1 says the opposite in terms: a benefic debilitated in an inauspicious house gives adverse effects. The decade is read from the Moon in your chart.
• "A Moon dasha is ten emotional years." Neither BPHS nor Saravali describes the period as a mood. Parashara's list is wealth, home, position, vehicles and children; mental strain appears only under the afflicted-Moon condition.
• "Everyone gets one." The age table above shows that people born in Mars, Rahu or Jupiter nakshatras reach the Moon dasha only at 69 or later, and many will not live it at all.
• "The dates are the same in every app." The start depends on the Moon's sidereal longitude, the ayanamsa and the year length used. This engine uses a 365.2425-day year; another convention moves the dates.
• "A sub-period's bad line will happen." Ch. 61 Sl. 2 says general inauspicious effects are not produced when the graha is well placed. The lists are defaults, not sentences.

How long is the Moon Mahadasha?

Ten years in the Vimshottari system, as given in BPHS Ch. 46 Sl. 15. The only exception is when it is the dasha you were born in: then only the balance remains, in proportion to how much of the birth nakshatra the Moon had left to cross (Sl. 16).

Which nakshatras start life in the Moon dasha?

Rohini, Hasta and Shravana. Counting the lords from Krittika as BPHS Ch. 46 Sl. 12-14 instructs, or by nakshatra index as the engine does, those are the three the Moon rules.

Is the Moon dasha good or bad?

The texts do not answer that in general. BPHS Ch. 47 gives a favourable list for a strong Moon in her own or exaltation sign, in a kendra, the 5th, 9th or 11th, with benefic influence, and an unfavourable list for a waning, debilitated or afflicted Moon or one in the 6th, 8th or 12th. A strong Moon in a difficult house is described as troubles and good times alternating.

Does a waning Moon change the reading?

In BPHS it does: Ch. 47 Sl. 23 names a waning Moon alongside debilitation as a cause of loss of wealth in her dasha, and Sl. 25 links a waning Moon in a dusthana to further difficulty. The verdict shown in this app does not include the phase, so check it separately.

Which antardasha is the longest?

Moon-Venus at 20 months, then Moon-Saturn at 19 and Moon-Rahu at 18. The shortest is Moon-Sun at 6 months (BPHS Ch. 51 Sl. 1).

BPHS lists remedies for each sub-period. Why are they not here?

Ch. 53 does name a recitation or a charitable gift after each antardasha. This app does not prescribe remedies, gemstones, mantras or rituals, so those lines are reported as existing in the text and not reproduced as advice.