---
title: "Aspect Timeline"
method: POST
path: "/aspect-timeline"
tags: ["Aspects & Points"]
---

# Aspect Timeline

`POST /aspect-timeline`

Calculate a timeline of when two specific planets form an exact aspect within a date range, including enter/exact/leave dates.

## Request body

- AspectTimeline
  - `startDate` string, required
  - `endDate` string, required
  - `stepDays` number
  - `planet1Ids` integer[]
  - `planet2Ids` integer[]
  - `aspectAngles` number[]
  - `maxOrb` number

## Response `200`

Successful calculation

- object
  - `ok` boolean
  - `data` object
    - `count` number, nullable
    - `timelines` object[], nullable
      - `planet1Id` number, nullable
      - `planet2Id` number, nullable
      - `aspect` object, nullable
        - `name` string, nullable
        - `i18nKey` string, nullable
        - `angle` number, nullable
        - `orb` number, nullable
        - `symbol` string, nullable
        - `isMajor` boolean, nullable
        - `color` string, nullable
      - `orbSeries` object[], nullable
        - `jd` number, nullable
        - `date` string, nullable
        - `orb` number, nullable
      - `exactDates` unknown[], nullable
        - unknown

## Other responses

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

## Changes

- **2026-08-24** `8ab5a768b521` — 1 warning, 2 info
  - removed the optional property `data/events` from the response with the `200` status
  - added the optional property `data/count` to the response with the `200` status
  - added the optional property `data/timelines` to the response with the `200` status
- **2026-08-23** `6828e5609564` — 4 breaking, 8 warning
  - the request property `maxOrb` became not nullable
  - the request property `stepDays` became not nullable
  - the `planet1Ids/items/` request property type/format changed from `number`/`` to `integer`/``
  - the `planet2Ids/items/` request property type/format changed from `number`/`` to `integer`/``
  - …8 more

[Change history](https://skmtc.dev/astroway/apis/astroway-calculation-api/changes/aspect-timeline/post.md)

---

[API](https://skmtc.dev/astroway/apis/astroway-calculation-api.md) · [All operations](https://skmtc.dev/astroway/apis/astroway-calculation-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/astroway/astroway-calculation-api/revisions/8ab5a768b521/schema)