---
title: "Sun and moon rise, set, transit and twilight"
method: GET
path: "/v1/ephemerides/"
tags: ["Ephemerides"]
---

# Sun and moon rise, set, transit and twilight

`GET /v1/ephemerides/`

## Request

- Base URL: `https://thirdtrail.life`
- URL: `https://thirdtrail.life/v1/ephemerides/`
- Auth: one of:
  - HTTP bearer
  - API key in cookie `sessionid`

The core ephemerides call. Elevation is a first-class input: supplying `elevation` shifts sunrise and sunset measurably at altitude, which sea-level-only APIs cannot express.

Features your plan does not include are omitted from the response; the request still succeeds.

## Query parameters

- `auto_elevation` boolean
- `auto_timezone` boolean
- `days` integer
- `elevation` number, double
- `lang` string
- `lat` number, double, required
- `lon` number, double, required
- `start_date` string
- `tz` string
- `utc_offset` string

## Response `200`

No response body

---

[API](https://skmtc.dev/thirdtrail/apis/thirdtrail-api.md) · [All operations](https://skmtc.dev/thirdtrail/apis/thirdtrail-api/llms.txt) · [OpenAPI document](https://skmtc.dev/thirdtrail/apis/thirdtrail-api/revisions/742040ec3db6?raw)