D30 chart (Trimshamsha): reading trials and their levers in Vedic astrology

What is the D30 Trimshamsha?

In Sanskrit, trimsha means thirty and amsha a part: the Trimshamsha is the thirtieth part of the sign. It belongs to the sixteen divisional charts Parashara describes in the Brihat Parashara Hora Shastra, and Parashara links it to the difficulties of existence: the rough patches, the leanings that complicate life, the ground where you stumble more easily.

Every chart has its D30, and none of them announces a misfortune: it shows where pressure builds, which planet colours it, and therefore which lever eases it. Read alongside the D1, it gives you a map of your points of vigilance: what is worth keeping an eye on, and what helps you hold.

How is the D30 chart calculated? The five unequal parts

Unlike the other divisional charts, the D30 does not cut the sign into equal parts. Each of the sign’s thirty degrees is given a ruler, and these degrees group into five unequal parts, ruled by Mars, Saturn, Jupiter, Mercury and Venus. In an odd sign, each part goes to its ruler’s odd sign; in an even sign, the order is reversed and each part goes to its ruler’s even sign:

• Odd signs (Aries, Gemini, Leo, Libra, Sagittarius, Aquarius): Mars from 0° to 5° (Aries), Saturn from 5° to 10° (Aquarius), Jupiter from 10° to 18° (Sagittarius), Mercury from 18° to 25° (Gemini), Venus from 25° to 30° (Libra).
• Even signs (Taurus, Cancer, Virgo, Scorpio, Capricorn, Pisces): Venus from 0° to 5° (Taurus), Mercury from 5° to 12° (Virgo), Jupiter from 12° to 20° (Pisces), Saturn from 20° to 25° (Capricorn), Mars from 25° to 30° (Scorpio).

Jupiter gets the widest part (8°), Mercury the next (7°), and Mars, Saturn and Venus 5° each. In an odd sign, Mars and Saturn open the sign; in an even sign, they close it.

Why neither the Sun nor the Moon in the D30?

Among Parashara’s sixteen charts, the D30 is the only one where the Sun and the Moon rule no part. Its rulers are the five visible planets other than the luminaries. The Sun and the Moon are still placed in it like the other planets: you look at which part they fall in.

A direct consequence: Cancer and Leo, the signs of the Moon and the Sun, receive no part. Neither the D30 Ascendant nor any planet lands there by the rule; only Ketu, which the site always places opposite Rahu, can end up there. The two houses they form therefore stay almost always empty.

What do you look at in a D30 chart?

The D30 is read with its own Ascendant and its houses as whole signs. Each part falls in a sign of its ruler, so a planet’s sign tells you its part straight away: Aries or Scorpio, Mars; Aquarius or Capricorn, Saturn; Sagittarius or Pisces, Jupiter; Gemini or Virgo, Mercury; Libra or Taurus, Venus. The main markers:

• Each planet’s part: those of Jupiter and Venus soften, those of Mars and Saturn ask for more effort, and Mercury’s takes on the colour of the planets around it.
• The D30 Ascendant and its ruler: your overall way of facing things when life gets harder.
• The Moon: the way you react to hard knocks, what worries you and what reassures you.
• The ruler of the D1 Ascendant: its part shows how your drive in life gets through trials.

The D30 does not say when. The dasha periods are what bring a tendency to the fore: a planet placed in a part of Saturn makes that slowness felt mostly during its own period, and that is also when its lever helps most.

The five parts of the D30: the tendency and the lever

Each part takes on the colour of its ruler. Here, for each one, is the slope to watch and the lever that turns it around.

• Part of Mars: impulse, anger that rises fast, haste. The lever: give that energy a chosen goal, physical effort or a cause, and sleep on it before deciding.
• Part of Saturn: fear, discouragement, loneliness in effort. The lever: structure and consistency; Saturn slows things down to make them last, so move step by step.
• Part of Jupiter: excess (of confidence, of promises, of generosity) and the certainty of being right. The lever: measure, learning, the advice of someone older.
• Part of Mercury: nervousness, scattering, words that run ahead of thought. The lever: write, sort, do one thing at a time.
• Part of Venus: complacency, comfort that lulls, attachment that holds you back. The lever: choose your pleasures rather than drift into them, and seek harmony in beauty and in bonds.

An example of a D30 reading

Take a generic chart. A Moon at 7° Taurus in the D1: Taurus is an even sign, and 7° falls in the second part, from 5° to 12°, the part of Mercury. In the D30, this Moon is in Virgo. Reading: in hard times, emotion goes through the head; you analyse, replay the scenarios, worry about details. The lever: put things down in writing, sort out what depends on you, give yourself small concrete tasks.

Same chart, an Ascendant at 27° Capricorn: an even sign, the last part, the part of Mars. The D30 Ascendant is therefore Scorpio, ruled by Mars. Reading: faced with trials, you do not bend; you go to the bottom of things, even if it means carrying everything alone. The lever: choose your battles, and let someone into the fight. Intensity then becomes determination.

What birth time accuracy does the D30 need?

The site gives it as about twenty-four minutes: the D30 parts are wide, 5° to 8°, so its Ascendant changes only five times per sign (every twenty to thirty minutes on average). That is an average: nobody knows in advance how close their birth falls to a boundary, and two minutes from a limit, a rounded time tips the D30 Ascendant over, and all its houses with it.

The planets, for their part, depend little on the time: even the Moon, the fastest, stays eight to sixteen hours in the same part. Without a birth time, the site switches the Vedic charts off; in France, the full copy of the birth record (copie intégrale) shows the time.

Look at the degree of your Ascendant in the Vedic D1: more than one degree away from a boundary (5°, 10°, 18° and 25° in an odd sign; 5°, 12°, 20° and 25° in an even sign), a few minutes either way do not change the D30 Ascendant.

How to open the D30 chart on the site

The D30 sits on the page of your chart, next to the Western wheel, which stays the default choice:

1. Calculate your birth chart with your exact time of birth.
2. At the wheel, choose Vedic (sidereal): the D1 (Rasi) opens.
3. In the list of divisional charts, choose D30.
4. For each planet, note its sign in the D30: it gives you its part, and so its ruler and its lever.

Never read the D30 on its own. A tendency is confirmed when the D1, the D6 of obstacles and the D8 of transformations point the same way, and it is lived in the period that activates it. That is the site’s rule: crossing the charts.