How the Siddhāṁśa is constructed
Each sign is divided into twenty-four parts of 1°15' each.
- Odd signs
- Counting begins from Leo — the Sun's sign, the seat of intelligence.
- Even signs
- Counting begins from Cancer — the Moon's sign, the seat of the receptive mind.
- The twelve deities, twice
- Skanda, Paraśudhara, Anala, Viśvakarmā, Bhaga, Mitra, Māyā, Antaka, Vṛṣadhvaja, Govinda, Madana and Bhīma repeat twice through the twenty-four divisions for an odd sign, and in reverse for an even one.
- Why Leo and Cancer
- Learning requires both the intelligence that grasps and the mind that retains. The two luminaries' signs anchor the chart because education is the joint work of buddhi and manas.
The 4th house is the key quadrant here — not the 10th
Every divisional chart has one house that carries its subject with special force, and in most charts attention drifts to the 10th out of habit. In the Siddhāṁśa it is the 4th house that matters most, because the 4th is the house of learning and formal education.
This is the single most useful correction to make when reading a D-24. The 4th of the D-24, its lord and its occupants tell you about the education itself: how far it goes, how easily, in what discipline. The 10th of the D-24 tells you about the recognition the learning brings, which is a different question and usually a lesser one.
Read the D-24 Lagna next as the studying self, and then Mercury and Jupiter — Mercury for the intelligence that analyses and acquires, Jupiter for the knowledge that is understood and held. A chart strong in Mercury and weak in Jupiter produces someone quick and well-informed who never quite goes deep; the reverse produces slow, genuine scholarship.
Reading the stages of education
The classical scheme reads the progression of education across houses: the 4th for primary and school education, the 9th for the first degree, and the 2nd for higher study beyond it. Each carries a different kind of learning, and a chart can be strong in one and weak in another.
For completion rather than commencement, read the 11th from the relevant house — the house of fulfilment. A promising 9th with an obstructed 11th from it is the signature of a degree begun and not finished, which is a specific and checkable prediction rather than a vague one.
Because the D-24 responds so clearly to real educational events, it is one of the better charts for birth-time rectification. Dated events — an admission, a failure, a degree conferred — can be run against the chart to test a proposed Lagna.
The Siddhāṁśa at a glance
Every figure here is specific to this division. The Vimśopaka rows give the share of the twenty-point strength score the Siddhāṁśa carries in each classical scheme — a blank means the division is not counted in that scheme at all.
| D24 | |
|---|---|
| Divisions per sign | 24 |
| Arc of one division | 1°15' |
| Divisional Lagna changes every | about 5 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 Siddhāṁśa
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 24, so the D24 Lagna moves to a new sign about 5 minutes — and the planets near a boundary shift with it. If your recorded time is uncertain by more than that, treat the D24 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.