---
title: "Planetary Cycles"
method: POST
path: "/planetary-cycles"
tags: ["Calendar & Cycles"]
---

# Planetary Cycles

`POST /planetary-cycles`

Find all conjunctions between two planets within a date range, defining the start of a new synodic cycle.

## Request body

- PlanetaryCycles
  - `planet1Id` number, nullable, required
  - `planet2Id` number, nullable, required
  - `startDate` string, required
  - `endDate` string, required

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `conjunctions` object[], nullable
      - `date` string, nullable
      - `longitude` number, nullable
      - `sign` string, nullable

## Other responses

- `400` — Validation error
- `401` — Missing or invalid API key

---

[API](https://skmtc.net/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.net/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/529d7d36d7d6/schema)