Divisional Charts (Vargas)¶

Divisional charts (Vargas) are derived charts created by subdividing each zodiac sign. They reveal specific domains of life with greater precision than the Rasi chart alone.

Overview¶

Each divisional chart is computed by dividing the 30° of a sign into equal or unequal segments, then assigning each segment to a sign of the zodiac according to classical rules. The result is a new "chart" where each planet has a modified sign placement.

`VargaType` Enum¶

Value	Division	Name	Life Domain
`D1`	1	Rasi	Overall life (main chart)
`D2`	2	Hora	Wealth and resources
`D3`	3	Drekkana	Siblings and courage
`D4`	4	Chaturthamsa	Fortune and property
`D7`	7	Saptamsa	Children and progeny
`D9`	9	Navamsa	Marriage and dharma
`D10`	10	Dasamsa	Career and profession
`D12`	12	Dwadasamsa	Parents
`D16`	16	Shodasamsa	Vehicles and comforts
`D20`	20	Vimshamsa	Spiritual life
`D24`	24	Chaturvimshamsa	Education and learning
`D27`	27	Saptavimshamsa	Strengths and weaknesses
`D30`	30	Trimshamsa	Misfortunes and evils
`D40`	40	Khavedamsa	Maternal heritage
`D45`	45	Akshavedamsa	Paternal heritage
`D60`	60	Shastiamsa	Past life karma (most sensitive)

Functions¶

`get_varga_rasi`¶

get_varga_rasi(longitude: float, division: int) -> int

Generic function to compute the varga sign for any integer division.

Formula: floor(longitude / (30 / division)) % 12 + 1

This is the simple proportional method — use get_varga_rasi_with_rules for classical accuracy.

`get_varga_rasi_with_rules`¶

get_varga_rasi_with_rules(longitude: float, varga: VargaType) -> int

Applies the classical Parasara rules for each varga division. For most vargas, sign assignment depends on:

Whether the base rasi is odd (Vishama) or even (Sama) — determines the counting direction
Special rules (e.g. D9 Navamsa cycles through the three nakshatras of each sign)
For D60: Each degree (0.5°) maps to a specific fixed rasi sequence

Returns: Sign number 1–12.

`compute_varga_chart`¶

compute_varga_chart(
    longitudes: dict[str, float],
    varga: VargaType
) -> VargaChart

Computes an entire divisional chart for all planets.

Parameters:

Parameter	Type	Description
`longitudes`	`dict[str, float]`	Planet code → sidereal longitude
`varga`	`VargaType`	The divisional chart to compute

Returns: VargaChart with:

Field	Type	Description
`varga_type`	`VargaType`	Which division was computed
`planet_signs`	`dict[str, int]`	Planet code → varga sign (1–12)
`division`	`int`	Numeric division factor

Classical Sign Assignment (D9 Navamsa)¶

The Navamsa is the most important divisional chart. Each sign's 30° is divided into 9 Navamsas of 3°20′ each. Counting starts from:

Base Rasi Type	Navamsa Starts From
Fire signs (Aries, Leo, Sagittarius)	Aries (1)
Earth signs (Taurus, Virgo, Capricorn)	Capricorn (10)
Air signs (Gemini, Libra, Aquarius)	Libra (7)
Water signs (Cancer, Scorpio, Pisces)	Cancer (4)

Classical Sign Assignment (D2 Hora)¶

Odd Sign	Even Sign
First half (0–15°) → Leo	First half (0–15°) → Cancer
Second half (15–30°) → Cancer	Second half (15°–30°) → Leo

Vargottama¶

A planet is Vargottama when it occupies the same sign in both the D1 (Rasi) and D9 (Navamsa) charts. This greatly strengthens the planet:

Occurs when a planet is in the first 3°20′ of a sign (Navamsa 1 = Rasi 1 within that triplicity)
Vargottama planets give their significations more fully and reliably

Usage Example¶

from ndastro_api.services.divisional_charts import compute_varga_chart, VargaType

# Get D9 Navamsa chart
d9 = compute_varga_chart(
    longitudes={"SU": 45.3, "MO": 120.7, "MA": 210.1, ...},
    varga=VargaType.D9
)

# Check Jupiter's navamsa sign
print(d9.planet_signs["JU"])  # e.g. 5 (Leo)