Welcome to the CHEOPS website!

Launch alert!

Launch events

The Mission

This is the official consortium homepage of the CHEOPS mission. CHEOPS is the first S-class mission from ESA and was selected in October 2012 with a launch foreseen in the last quarter of 2019.

CHEOPS stands for CHaracterising ExOPlanet Satellite. It is a small photometric observatory to be launched into low Earth orbit to measure transits of exoplanets. See the «Executive Summary» for a short overview.

Please use the menu for further information. The majority of the homepage is currently only available in English. The menu item «public» is also available in German and French.

CHEOPS' location

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CHEOPS-Children’s Drawings Campaign

Shown below are 3 of the 2748 drawings that will fly into space with the CHEOPS satellite.


17 September 2019
Scientists at the Geneva Observatory in Switzerland will be processing data from Cheops, ESA's Characterising Exoplanet Satellite, scheduled to launch…
21 August 2019
The space telescope CHEOPS is foreseen to launch in the last quarter of 2019. “In July, we carried out the…
15 August 2019
Teams of scientists and engineers are simulating the launch, early orbit phase and commissioning of the CHEOPS mission ahead of…
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Picture of the month

September 2019
New 1:1 CHEOPS mock-up exposed at the EPSC-DPS 2019, 15 – 20 September 2019, in the hall of the International…


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