D6 Shashtamsha: health, conflicts and obstacles in Vedic astrology

What is the D6 Shashtamsha chart?

Shashtamsha (also spelled Shashtamsa) means “the sixth part” in Sanskrit. Like every divisional chart, the D6 cuts each sign of your D1 Rasi, the root chart, into equal parts and redistributes your planets into a new chart. That chart enlarges a single area: the 6th house, which Indian tradition links to adversaries (ripu), debts (rina) and whatever unsettles the body (roga).

The D6 is not one of the sixteen charts Parashara lists in the Brihat Parashara Hora Shastra (the Shodashavarga, “the sixteen divisions”). Practice added it, like the D5, the D8 and the D11, to take a close look at what the D1 only sketches.

Its field is less health in the medical sense than resilience: your underlying vitality, the habits that feed it or wear it down, the energy you put into defending yourself. In the Western chart, the 6th house also speaks of daily life, everyday work and lifestyle: the two readings echo each other.

How is the D6 chart calculated?

Each sign is divided into six parts of 5°, and each part sends the planet to a sign of the D6. For an odd sign (Aries, Gemini, Leo, Libra, Sagittarius, Aquarius), you count from Aries: from 0° to 5°, the planet goes to Aries, from 5° to 10° to Taurus, and so on up to Virgo for the last five degrees. For an even sign (Taurus, Cancer, Virgo, Scorpio, Capricorn, Pisces), you count from Libra, up to Pisces.

The degree in the D6 is the degree in the sign multiplied by six, minus whole rounds of 30°. Example: Mars at 12° Taurus. Taurus is even, so you count from Libra; 12° falls in the third part (10° to 15°), so Libra, Scorpio, Sagittarius. And 12 × 6 = 72, which leaves 12° once two rounds are removed: Mars sits at 12° Sagittarius in your D6.

The calculation uses the sidereal zodiac, with the Lahiri ayanamsa: your Vedic degrees are shifted by about 24° from those of your Western chart. Always start from the positions of the Vedic D1, never from the tropical wheel.

What do you look at in the D6?

A divisional chart is read as a full chart, with its own houses, counted as whole signs from its Ascendant. In the D6, four markers are enough to begin with.

1. The D6 Ascendant and its ruler: your constitution, the ground from which you meet effort. A well-placed ruler (in its own sign, exalted, in a strong house) gives resources; a weakened ruler asks you to manage your reserves.
2. The 6th house of the D6 and the planets in it: the way you fight. Classically, a malefic such as Mars or Saturn in the 6th house is a strength: it stands up to rivals and does not give way before an obstacle.
3. The ruler of the 6th house of your D1: its placement and condition in the D6 show whether the matters of that house resolve with ease or call for method.
4. Mars and Saturn, the two planets tied to the 6th house: Mars for the drive to fight, Saturn for endurance. Their strength in the D6 shows the energy of the struggle and the capacity to hold on.

For conflicts, add Jaimini’s Gnatikaraka, the planet that carries rivalries and obstacles (see the Jaimini karakas): its place in the D6 shows where tensions come from and how to defuse them.

How to read the D6 chart: an example

Take a D6 with a Capricorn Ascendant, and Saturn, its ruler, in Libra, its sign of exaltation, in the chart’s 10th house. The ground is solid, but it is built through regularity: this chart responds to habits kept over time (steady sleep, moderate and consistent exercise) far more than to bursts of effort. The point of care is the fatigue that builds up when work, the 10th house, takes up all the room.

Add Mars in the 6th house of the D6. This is a fighter’s signature: faced with a conflict or a difficulty, this person bounces back fast and meets it head-on. The lever is to give that energy a channel (sport, a concrete challenge, a project to defend); the point of care is getting carried away: wanting to settle everything by force and wearing yourself out.

This reading makes no diagnosis and gives no date: it describes a way of functioning and the levers that support it. An astrologer never replaces a doctor; the D6 is read to take better care of yourself, not to worry.

The D6 with the D1 and the dashas

The D6 is never read on its own. A planet strong in the D1 but weak in the D6 promises a lot and needs looking after; the reverse reveals a resilience you did not suspect.

The Vimshottari dashas give the timing. When the period of the 6th house ruler, or of a planet placed in the 6th house of the D6, is running, the themes of this chart come to the fore: it is the time to settle a lingering conflict, rethink your pace, strengthen your habits. For the method, see how to cross the charts; for sudden changes and resilience, the D8 Ashtamsha takes over, and the D30 Trimshamsha shows the tendencies to watch.

What birth time accuracy does the D6 need?

A time accurate to about twenty minutes. The D1 Ascendant changes sign roughly every two hours; in the D6, each sign is cut into six, so the chart’s Ascendant changes on average every twenty minutes, faster or slower depending on the rising signs. The twelve houses of the D6 move with it.

The signs of the planets hold up better: a planet must travel 5° to change sign in the D6, which the Moon, the fastest, takes about nine hours to do. In France, the full copy of the birth record (copie intégrale) shows the time; without a time, the site does not open the Vedic view, because the Ascendant and the houses depend on it.

A rounded time (“around 3 pm”) can be put to the test: calculate the chart for the recorded time, then twenty minutes before and after. If the D6 Ascendant does not change, rely on it; if it does, read mainly the planets in their signs.

How to open the D6 on the site

The D6 is calculated from your birth chart, with the exact time. Three steps are enough, and the site tells you for each chart how accurate the time needs to be. To place the D6 among the other charts, the Vedic astrology home page presents them all.

1. Calculate your chart with your date, time and place of birth.
2. At the wheel, switch from “Tropical (Western)” to “Vedic (sidereal)”: the D1 opens.
3. In the list of charts, choose the D6: the wheel, the positions and the line that gives the chart’s meaning all change.

In the D6, as in every chart, Ketu stays opposite Rahu; Uranus, Neptune and Pluto are shown set back, because classical Vedic astrology reads the seven visible planets and the two nodes.