What the D150 chart is read for
The D150 is the finest division this engine computes: 1800 nadiamsas across the zodiac, each spanning twelve minutes of arc. It belongs to the Nadi tradition rather than to Parashara's sixteen vargas, where it is used to separate charts that are otherwise nearly identical - the reason it exists at all is that people born minutes apart need distinguishing.
How the D150 is calculated
Each sign divides into 150 parts of 12'. That is 1800 divisions across the zodiac, and roughly thirty seconds of birth time per division.
| Property | Value |
|---|---|
| Division | D150 |
| Span of one amsa | 12' |
| Amsas across the zodiac | 1800 |
Reading it alongside the birth chart
In practice it is not read as a chart in the way the D9 or D10 are. It is a discriminator: useful for telling near-identical horoscopes apart, and for the Nadi tradition's own methods, which do not reduce to reading houses and lords.
What a divisional chart will not tell you
Be honest about what 12' of arc means: about half a minute of birth time. Almost nobody knows their birth time to that precision, so for most people the D150 is a real calculation performed on an input too coarse to support it. It is included for completeness, not because it should carry a decision.
Frequently asked
- What is the Nadiamsa (D150) chart?
- The finest subdivision in use - 150 parts per sign, 1800 across the zodiac, each spanning 12' of arc. It comes from the Nadi tradition rather than Parashara's sixteen vargas.
- Is the D150 usable in practice?
- Rarely. Each division spans about half a minute of birth time, and almost no one knows their birth time that precisely. It is mainly a discriminator between near-identical charts, not a chart to base a decision on.
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