How a longitude becomes D9
Follow the nine-part mapping rather than memorizing a separate chart.
A sign contains Navamsha numbers 1 through 9. The exact degree inside the natal sign decides which Navamsha contains the planet.
The traditional sequence can be taught by sign modality: movable signs begin from the same sign, fixed signs begin from the ninth sign, and dual signs begin from the fifth sign.
The software uses the equivalent continuous 3°20′ segmentation across the full 360° zodiac, which avoids lookup-table mistakes.
Navamsha is derived from the exact natal degree; it is not a second independent sky chart. Always preserve the D1 placement and use D9 to compare how the same graha maps into the ninth division.
A useful D1↔D9 comparison asks whether the sign/dignity changes, whether the graha becomes Vargottama, and where it falls by house in D9. It should not turn every difference into “good” or “bad.”
How to read it
- Confirm the natal degree.
- Find the Navamsha number inside the natal sign.
- Map it to the D9 sign.
- Compare D1 and D9 sign/dignity/house.
- Return to the natal topic before interpreting.
Key points
- D9 is derived from D1 longitude.
- Vargottama means same Rashi in D1 and D9; it is a structural fact, not an automatic verdict.
- D9 refines; it does not replace D1.
Do not read a D9 placement as if it were the planet’s astronomical natal longitude.
Apply this lesson to a chart
- Choose one planet in Navamsha Lab.
- Write its D1 sign/degree, Navamsha number, D9 sign and D9 house.
- State whether it is Vargottama and explain how you know.