A second chart, built by cutting every sign into nine, that tells you whether a planet is as strong as it looks.
The navamsa, or D9, is a second chart built by dividing each 30-degree sign into nine parts of 3 degrees 20 minutes each and mapping every planet onto whichever new sign its part corresponds to. Tradition treats it as the reference call behind the main chart: a planet that looks strong on the surface but lands badly in the D9 tends to promise more than it delivers, and one that looks ordinary on the surface but strong underneath tends to outperform its appearance. A planet landing in the same sign in both charts is vargottama and is read as unusually consistent.
Every planet's surface sign, its D9 sign, and the direction of travel between the two. In this chart Venus is Neutral on the surface and Own Sign underneath, which reads as stronger than it looks.
Each sign spans 30 degrees. Cut that into nine equal parts and each part is 3 degrees 20 minutes wide. A planet sitting at, say, 24 degrees of Pisces falls in the eighth of those nine slices, and that slice maps to a specific sign by a fixed rule. That mapped sign is the planet's navamsa position.
The precision is the point. Because a slice is only 3 degrees 20 minutes wide, the Moon crosses one in about six and a half hours and the ascendant crosses one in roughly eight minutes. That is why the D9 is the first thing to become unreliable when a birth time is approximate, and why an astrologer who takes the navamsa seriously will push hard on the exact minute.
The main chart, the D1, says what a planet is doing and where. The navamsa is treated as the question of whether it can sustain it. The everyday analogy is a résumé and a reference call: the surface chart is what the planet claims, and the D9 is what happens when you check.
So the reading is comparative rather than absolute. Take a planet's dignity on the surface, take its dignity in the D9, and the direction of travel between them is the finding. Stronger underneath than on top reads as a planet that outperforms its appearance and delivers more than it seems to promise. Weaker underneath reads as the reverse, a placement that presents well and struggles to hold up.
This is also the traditional marriage chart, read alongside the 7th house rather than instead of it, which is why the D9 gets more attention than any other divisional chart.
A planet that lands in the SAME sign in both the main chart and the navamsa is vargottama, literally best in division. It is read as unusually consistent and hard to shift, because both the surface and the check agree on it.
Two of the nine slices in each sign are pushkara, treated as especially auspicious. A planet landing in one is read as delivering generously even when the surface chart looks unremarkable. Both are computed from the same division, not judged, so either they are true of a placement or they are not.
It is a divisional chart built by cutting every sign into nine parts of 3 degrees 20 minutes and mapping each planet onto the sign its part corresponds to. It is read as the strength check behind the main birth chart, and traditionally as the marriage chart alongside the 7th house.
No, and it is not read on its own. The main chart says what is happening and where; the navamsa says whether it holds up. A planet is judged by comparing the two, and a D9 reading detached from the D1 is missing the half that gives it meaning.
It means a planet occupies the same sign in the main chart and in the navamsa. Both the surface and the check agree, so the placement is read as unusually consistent and stable, whatever else it is doing.
Because each division is only 3 degrees 20 minutes wide. The ascendant moves through one in roughly eight minutes, so a birth time that is off by a quarter of an hour can hand you a completely different navamsa lagna. Planetary D9 positions are more forgiving than the D9 ascendant, but the whole chart is the first thing to degrade when the time is a guess.
Read end to end the six units give you more guidance than anyone keeps. Deduplicated it comes to eight rules, ranked by how many separate places each one came from.
Every placement, dignity, degree, retrograde flag, D-9 position and aspect on this page, including the worked example, is computed by the AstroMedha Vedic engine from birth details. Nothing here is worked out by hand.