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In short
The Trimshamsa, or D30, divides each sign into five unequal bands of 5, 5, 8, 7 and 5 degrees, ruled in an odd sign by Mars, Saturn, Jupiter, Mercury and Venus and reversed in an even sign. BPHS reads "evil effects" from it. This app reports the ruling planet for each point rather than a twelve-house chart.
What the term means
Trimshamsa means "thirtieth part", but unlike the other vargas it does not cut the sign into thirty equal pieces. It uses five bands of unequal width, each ruled by one of the five non-luminary grahas. The Sun and the Moon rule no band.
Where the term comes from
BPHS Ch. 6 Sl. 27-28 gives the scheme for an odd sign: Mangal, Shani, Guru, Budh and Shukr rule 5, 5, 8, 7 and 5 degrees in that order; "in the case of an even" sign the spans, the lords and the deities are reversed. Ch. 7 Sl. 1-8 assigns the chart "evil effects", the translation's phrase. Ch. 7 Sl. 13-16 adds that for Trimshamsa effects the Sun behaves like Mars and the Moon like Venus. It is one of the six Shad Varga charts and carries a Vimshopak weight of 1 in both the six- and sixteen-chart schemes.
How this app computes it
| Odd sign | Lord | Even sign | Lord |
|---|---|---|---|
| 0-5° | Mars | 0-5° | Venus |
| 5-10° | Saturn | 5-12° | Mercury |
| 10-18° | Jupiter | 12-20° | Jupiter |
| 18-25° | Mercury | 20-25° | Saturn |
| 25-30° | Venus | 25-30° | Mars |
- For each planet and the Ascendant the engine returns the band's lord and whether that lord is a natural benefic. The calculator shows these lords; it draws no D30 house wheel, because BPHS defines the D30 by lordship, not by a sign the point moves to.
- For grading in Vimshopaka bala the engine also attaches a sign, the lord's own odd-footed sign for an odd sign and its even-footed sign for an even one. Its code says this is a convention the text does not state.
A small illustration
For 19 January 1985, 11:14 IST, New Delhi, the Sun is at Capricorn 5.46. Capricorn is even, so 5.46 falls in the 5-12 band of Mercury, graded as Virgo. The Moon at Sagittarius 12.66 is in an odd sign's 10-18 band, ruled by Jupiter. Mars at Aquarius 25.40 sits in the last band of an odd sign, ruled by Venus.
Pages that use this term
- Trimshamsa (D30) calculator - the ruling planet for each point in your chart.
- Sagittarius (Dhanu Rashi) and Aries (Mesha Rashi) - sign pages that set out their D30 bands.
- Mars in Vedic astrology - a graha page that refers to the D30.
- Saturn in Vedic astrology - another graha that rules two of the ten bands.
Related terms
- Odd and even signs - the split that reverses the bands.
- Shubha graha and Papa graha - the benefic flag on each lord.
- Divisional chart - the family the D30 belongs to.
Trimshamsa D30 Lords
Five unequal bands per sign, each with a ruling planet and a sign of its own.
What it needs
Date, time and place
That is more than this article asks for - it only ever takes a date, and sometimes a time, and never a name or a birth place. So this one runs on its own page, which asks for exactly what it needs and stores none of it.
Run it on its own page