Transit Chart Endpoint #

`POST /api/v5/chart/transit` #

View Complete Example

This endpoint generates a transit chart as a dual-wheel SVG visualization, showing how current (or future) planetary positions interact with a person’s natal chart. Transits are the foundation of predictive astrology, revealing timing for opportunities, challenges, and significant life events.

Chart Preview #

Transit Chart Example

The chart displays:

Inner Wheel: The natal (birth) chart — the permanent foundation
Outer Wheel: The transit chart — current or future planetary positions
Transit-to-Natal Aspects: How transiting planets aspect natal planets and points

Use cases:

Personal Forecasting: Predict important periods for career, relationships, health
Timing Decisions: Choose optimal moments for major life changes
Understanding Current Events: Gain perspective on why certain themes are emerging
Yearly Planning: Map out the astrological landscape for the year ahead

Request Body #

first_subject (object, required): Natal subject. See Subject Object Reference.

{
    "name": "Natal Subject",
    "year": 1990,
    "month": 1,
    "day": 1,
    "hour": 12,
    "minute": 0,
    "city": "London",
    "nation": "GB",
    "longitude": -0.1278,
    "latitude": 51.5074,
    "timezone": "Europe/London"
}

transit_subject (object, required): Transit moment. Uses a simplified subject model — does not include zodiac_type, sidereal_mode, perspective_type, or houses_system_identifier (these are inherited from first_subject). The name field defaults to "Transit".

{
    "year": 2024,
    "month": 1,
    "day": 1,
    "hour": 0,
    "minute": 0,
    "city": "London",
    "nation": "GB",
    "longitude": -0.1278,
    "latitude": 51.5074,
    "timezone": "Europe/London"
}

Transit-specific options (optional):

include_house_comparison (boolean): Include house overlay comparison in the data. Default: true.

Computation options (optional):

active_points (array of strings): Override which celestial points are included. See Active Points.
active_aspects (array of objects): Override which aspects are calculated and their orbs. See Active Aspects.
distribution_method (string): "weighted" (default) or "pure_count".
custom_distribution_weights (object): Custom weights map for weighted distribution.

Rendering options (optional):

theme (string): Visual theme. Default: "classic". See Themes.
language (string): Language for chart labels. Default: "EN". See Languages.
style (string): "classic" (default) or "modern".
split_chart (boolean): Return separate chart_wheel and chart_grid SVGs. Default: false.
transparent_background (boolean): Render with transparent background. Default: false.
custom_title (string): Override the chart title (max 40 characters).
show_house_position_comparison (boolean): Show the house comparison table. Default: true.
show_cusp_position_comparison (boolean): Show cusp comparison grids for natal vs transit. Default: true.
show_degree_indicators (boolean): Show radial lines and degree numbers. Default: true.
show_aspect_icons (boolean): Show aspect icons on aspect lines. Default: true.
show_zodiac_background_ring (boolean): Show colored zodiac wedges ("modern" style only). Default: true.
double_chart_aspect_grid_type (string): Aspect display layout — "list" (default) or "table".

Complete Request Example #

{
    "first_subject": {
        "name": "Natal Subject",
        "year": 1990,
        "month": 1,
        "day": 1,
        "hour": 12,
        "minute": 0,
        "city": "London",
        "nation": "GB",
        "longitude": -0.1278,
        "latitude": 51.5074,
        "timezone": "Europe/London"
    },
    "transit_subject": {
        "year": 2024,
        "month": 1,
        "day": 1,
        "hour": 0,
        "minute": 0,
        "city": "London",
        "nation": "GB",
        "longitude": -0.1278,
        "latitude": 51.5074,
        "timezone": "Europe/London"
    },
    "theme": "classic",
    "style": "modern",
    "show_zodiac_background_ring": true,
    "double_chart_aspect_grid_type": "list"
}

Response Body #

status (string): "OK".
chart_data (object): Transit data (same structure as the Transit Chart Data endpoint).
chart (string): SVG string (when split_chart is false).
chart_wheel (string): SVG of the dual wheel (when split_chart is true).
chart_grid (string): SVG of the aspect grid (when split_chart is true).

Complete Response Example #

{
  "status": "OK",
  "chart_data": { ... },
  "chart": "<svg ...> ... </svg>"
}