# Helmos

*Observatory*

Helmos Observatory, Aristarchos telescope

| | |
| --- | --- |
| Where it is | 37.9800° N, 22.2000° E |
| State | GR |
| What is done there | optical observatory |
| Main mirror | 2.3 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 Helmos or Chelmos Observatory is an observatory located at the top of mount Chelmos, near Kalavryta, Southern Greece. It is the largest research infrastructure of the National Observatory of Athens and IAASARS. The observatory was completed and first opened in 2001.

## Elsewhere

- This place on the live map: https://www.orbitalmap.space/?at=37.98,22.20
- The article this row is vouched by: https://en.wikipedia.org/wiki/Helmos_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.