How the Viṁśāṁśa is constructed
Each sign is divided into twenty parts of 1°30' each.
- Movable signs
- Counting begins from Aries.
- Fixed signs
- Counting begins from Sagittarius.
- Dual signs
- Counting begins from Leo.
- Twenty presiding deities
- The text names a goddess for each division — Kālī, Gaurī, Jayā, Lakṣmī, Vijayā, Vimalā, Satī, Tārā, Jvālāmukhī, Śvetā and the rest for an odd sign, with a different set of twenty for an even one. That the presiding powers of this chart are all forms of the Goddess is itself the statement about what the chart is for.
Read this chart on its own
A rule worth stating firmly, because it is broken constantly by software: the D-20 should not be folded into a general per-house reading. Ordinary house analysis of a topic uses the birth chart and its confirming division. The Viṁśāṁśa is not a confirming chart for anything else — it is a chart about one subject, and its houses mean what they mean only within that subject.
A malefic in the 7th of the D-20 says nothing about your marriage. It says something about obstruction in practice, or about the form the practice takes in relation to a teacher or a tradition. Read the chart in its own terms or do not read it.
How to read the D-20
Begin with the D-20 Lagna and its lord — the practising self, the person as they are when they turn inward. Then the 5th house, which carries mantra and the merit that makes practice possible, and the 9th, which carries the teacher, the lineage and the tradition received.
Jupiter and Ketu are the two grahas to watch. Jupiter shows the received tradition, the scripture, the formal path; Ketu shows what happens when the person stops wanting the world's answers. Ketu in a spiritual house of the D-20 is one of the more reliable indications of genuine, sustained practice rather than intermittent interest.
The 12th of the D-20 is the house of the final result — dissolution, surrender, the point where practice stops being something you do. In a chart where the 12th of the D-20 is strong and well-supported, the practice tends to deepen with age rather than lapse.
The Viṁśāṁśa at a glance
Every figure here is specific to this division. The Vimśopaka rows give the share of the twenty-point strength score the Viṁśāṁśa carries in each classical scheme — a blank means the division is not counted in that scheme at all.
| D20 | |
|---|---|
| Divisions per sign | 20 |
| Arc of one division | 1°30' |
| Divisional Lagna changes every | about 6 minutes |
| Vimśopaka weight · Ṣaḍvarga (6) | — |
| Vimśopaka weight · Saptavarga (7) | — |
| Vimśopaka weight · Daśavarga (10) | — |
| Vimśopaka weight · Ṣoḍaśavarga (16) | ½ |
Counted only in the full sixteen-division scheme. That is a statement about how the tradition ranks it — real, but supporting rather than decisive.
How accurate your birth time needs to be for the Viṁśāṁśa
The Rāśi Lagna moves through a whole sign in roughly two hours, which is why the birth chart tolerates an approximate time. This division cuts each sign into 20, so the D20 Lagna moves to a new sign about 6 minutes — and the planets near a boundary shift with it. If your recorded time is uncertain by more than that, treat the D20 Lagna and any house-based conclusion drawn from it as provisional, and rectify the time against dated life events before relying on it. Sign placements of the slower grahas stay stable much longer than the Lagna does.
How this is computed
Positions come from an astronomical ephemeris, converted to the sidereal zodiac on the Lahiri (Citrapakṣa) ayanāṁśa and computed by our own Parāśara engine — no pre-written results, and no language model anywhere near a number. Where the classical texts disagree, this page names the convention we follow instead of quietly picking one.