---
title: "Harmonic Astrology (泛音占星)"
method: GET
path: "/api/trpc/harmonics.compute"
tags: ["Western"]
---

# Harmonic Astrology (泛音占星)

`GET /api/trpc/harmonics.compute`

## Request

- Base URL: `https://api.asktian.com`
- URL: `https://api.asktian.com/api/trpc/harmonics.compute`
- Auth: HTTP bearer

Harmonic astrology in the lineage of John Addey's Harmonics in Astrology (1976) and David Hamblin's Harmonic Charts (1983) — reads the hidden RHYTHMS running through a chart. Each Nth-harmonic chart re-plots every body at Hₙ(λ) = (n·λ) mod 360, so two planets exactly 360/n° apart in the radix land on the same degree — making each harmonic isolate one aspect family and one Pythagorean number-meaning: H4 effort/manifestation (square), H5 creativity/'the artist' (quintile), H7 inspiration/imagination (septile), H9 ideals/completion (novile), with H2/H3/H6/H8/H12 the opposition/trine/sextile/semisquare/semisextile. The signal is the CONJUNCTIONS each harmonic brings together (not the harmonic-chart signs). Includes the AGE HARMONIC — the predictive layer casting Hₙ with n = age + 1 (Age+1; Anthony Louis / Solar Fire) using a fractional n. H1 ≡ the radix, and factor longitudes share our natal ephemeris so they agree by construction. Honest: harmonics is a structured way to inspect aspect families, not a validated predictor; this is NOT the Vedic Navāṃśa (a discrete whole-sign varga). Locked against the formula's published collapses (trine ×3, quintile ×5, septile ×7, novile ×9 → 0°), the composition invariant, and the cosmobiology identity (H4 = the 90° dial ×4).

Cost: 7 TIAN Points per call. tRPC procedure `harmonics.compute`.

## Query parameters

- `input` string

## Response `200`

tRPC result envelope

- TrpcResult: tRPC HTTP response envelope.
  - `result` object
    - `data` object: The procedure's return value (system-specific).

---

[API](https://skmtc.dev/asktian/apis/asktian-metaphysics-api.md) · [All operations](https://skmtc.dev/asktian/apis/asktian-metaphysics-api/llms.txt) · [OpenAPI document](https://skmtc.dev/asktian/apis/asktian-metaphysics-api/revisions/3c8fdc979206?raw)