---
title: "Retrograde Periods"
method: POST
path: "/retrograde-periods"
tags: ["Calendar & Cycles"]
---

# Retrograde Periods

`POST /retrograde-periods`

Find all retrograde stations (direct, retrograde, stationary) for a planet within a date range.

## Request body

- Retrograde
  - `startDate` string, required
  - `endDate` string, required
  - `planetIds` number[]

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `periods` object[], nullable
      - `retrogradStation` string, nullable
      - `directStation` string, nullable
      - `shadowEntry` string, nullable
      - `shadowExit` string, nullable
      - `retrogradeLongitude` number, nullable
      - `directLongitude` number, 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)