ephemeris

Harmonic Chart Analysis

Calculate harmonic chart positions by multiplying natal longitudes by a harmonic number N and reducing modulo 360°. Finds conjunctions in the harmonic space to reveal hidden aspect patterns.

Harmonic analysis is the mathematical backbone of aspect theory: the 5th harmonic unfolds quintiles, the 7th reveals septiles, the 9th produces the Vedic navamsa. Higher harmonics expose increasingly subtle geometric relationships invisible in a standard chart wheel.

🤖 Agent-first endpoint — pure deterministic math, no ephemeris required.

post/ephemeris/harmonics

Request

  • Base URL: https://api.openephemeris.com
  • URL: https://api.openephemeris.com/ephemeris/harmonics
  • Auth: one of:
    • HTTP bearer
    • API key in header X-OpenEphemeris-API-Key
    • API key in header X-API-Key
    • API key in header X-Service-Key

Query parameters

formatstring

Response format: json | llm.

output_modestring nullable

Deprecated: use format. Accepts full|simple|llm.

Request body

harmonicinteger required

Harmonic number (1–360). H1 = natal, H5 = quintile, H9 = navamsa.

orbnumber

Orb in degrees for conjunction detection in the harmonic chart.

Response

Successful Response

harmonicinteger

The harmonic number that was calculated

significancestring

Astrological significance of this harmonic

Changes

No recorded changes to this operation across all 1 revision of this API.