Draconic Chart

Compute a draconic chart by rotating all positions so the North Node falls at 0° Aries. The draconic chart is used in karmic and spiritual astrology to reveal the "soul's chart" — positions relative to the nodal axis rather than the vernal equinox.

GET  /v1/draconic
POST /v1/draconic

Credit cost: 2

Parameters

The bodies list must include mean_node or true_node. The default "planets" preset includes mean_node. If you specify a custom body list without either node, the API returns no_north_node.

How it works

1. Compute a standard natal chart for the given datetime and location
2. Find the North Node's ecliptic longitude
3. Subtract that longitude from every position (planets, cusps, angles)
4. The result: North Node is at 0° Aries, and all other positions are measured relative to it

This rotation preserves all aspects between bodies (since the angular relationships don't change), but the sign placements shift to reflect positions relative to the nodal axis.

Response

The response has the same structure as /v1/natal-chart, with metadata.source set to "draconic".

{
  "data": {
    "metadata": {
      "source": "draconic",
      "..."
    },
    "bodies": [
      {
        "name": "mean_node",
        "longitude": 0.0,
        "sign": "aries",
        "sign_degree": 0.0,
        "..."
      },
      {
        "name": "sun",
        "longitude": 84.5,
        "sign": "gemini",
        "sign_degree": 24.5,
        "..."
      }
    ],
    "houses": { "..." },
    "aspects": [ "..." ],
    "parallels": [],
    "dignities": [ "..." ]
  },
  "meta": { "..." }
}

Note that mean_node will always be at exactly 0.0° (0° Aries).

Examples

Basic draconic chart

curl "https://api.morphemeris.com/v1/draconic?datetime=1990-06-15T18:30:00Z&lat=40.7128&lon=-74.006" \
  -H "Authorization: Bearer morphemeris_live_YOUR_KEY"

const res = await fetch(
  "https://api.morphemeris.com/v1/draconic?datetime=1990-06-15T18:30:00Z&lat=40.7128&lon=-74.006",
  { headers: { Authorization: "Bearer morphemeris_live_YOUR_KEY" } }
);
const { data } = await res.json();

import requests

res = requests.get(
    "https://api.morphemeris.com/v1/draconic",
    params={"datetime": "1990-06-15T18:30:00Z", "lat": 40.7128, "lon": -74.006},
    headers={"Authorization": "Bearer morphemeris_live_YOUR_KEY"},
)
data = res.json()

Using true node for rotation

curl "https://api.morphemeris.com/v1/draconic?datetime=1990-06-15T18:30:00Z&lat=40.7128&lon=-74.006&node=true_node&bodies=sun,moon,mercury,venus,mars,jupiter,saturn,true_node" \
  -H "Authorization: Bearer morphemeris_live_YOUR_KEY"

Tips

• Compare draconic positions to tropical positions for insight into the relationship between the "soul" chart and the "personality" chart.
• Draconic charts are often used in synastry — compare one person's draconic chart to the other's tropical chart using separate API calls.
• The true_node oscillates more than the mean_node (by about ±1.5°), which slightly changes all draconic positions.