# Calar Alto

*Observatory*

Calar Alto Observatory, Almería

| | |
| --- | --- |
| Where it is | 37.2200° N, 2.5500° W |
| State | E |
| What is done there | optical observatory |
| Main mirror | 3.5 m |
| Still working | yes |

Test ranges, observatories and ground stations are a hand-picked list kept in this project rather than a published catalogue: no catalogue answers which of the world's thousands of observing sites belong on a map of it. The article below is what lets the choice be argued with.

## What it is

The Calar Alto Observatory is an astronomical observatory located in Almería province in Spain on Calar Alto, a 2,168-meter-high (7,113 ft) mountain in the Sierra de Los Filabres subrange of the Sierra Nevada.
Until 2018, Calar Alto was owned and operated jointly by the German Max Planck Institute for Astronomy in Heidelberg, and the Spanish Institute of Astrophysics of Andalusia (IAA-CSIC) in Granada.

## Elsewhere

- This place on the live map: https://www.orbitalmap.space/?at=37.22,-2.55
- The article this row is vouched by: https://en.wikipedia.org/wiki/Calar_Alto_Observatory
- Every object: https://www.orbitalmap.space/o/
- What this site is and what it reads: https://www.orbitalmap.space/llms.txt

## Where this came from

Compiled 2026-09-17. Selected by hand for this project. Description from Wikipedia (en). Description: CC BY-SA 4.0.