**** The CHEOPS Discretionary Programme is now open ****


It is essential to contact the ESA CHEOPS Project Scientist (see email below) to check the status of your proposed target before considering submitting a proposal


​​​​​​​                          Please send an email to the ESA CHEOPS Project Scientist, kate dot isaak at esa.int in case of questions, replacing the " dot " and the " at " with a "." and "'@" respectiviely


Last updated:  1 Dec 2020


CHEOPS Discretionary programme


This webpage provide prospective users of CHEOPS with all information (policies and procedures for the programme, documentation, tools and links)  required to prepare and submit proposals to the CHEOPS Discretionary Pragmme, through which 5% of the nominal science observing obsering time on CHEOPS will be allocated.

To be eligible for the Discretionary Programme a proposal must meet the following criteria:

  • Contain a single target of high scientific interest
  • Demonstrate that the target was either (a) discovered, or (b) declared to be of high scientific interest since the close of the previous call (16 May 2019)
  • Contain a target/event that is observable by the date foreseen for the end of AO cycle 2 (March 24 2022), and that is not on the CHEOPS Reserverd Target List

Details regarding what needs to be included in a proposal, together with the tools and documentation to support proposal preparation and submission, can be found in the Policies and Procedures document for the Discretionary Programme. Prospective observers are STRONGLY RECOMMENDED to read very carefully through this document.

Important Notes:

In case of questions, please send an email to cheops-support@cosmos.esa.int,  or kate dot isaak at esa.int, replacing the " dot " by "." and " at " by "@".




Tools and supporting manuals:


Useful Data/information:


User-contributed tools/aids:

Below is a list of tools that have been developed by members of the CHEOPS Science Team for their own use. These have been made available "as-is" via the links below, with caveats and warnings that are detailed in the individual pages