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Open Exoplanet Catalogue
The Open Exoplanet Catalogue collects discovered extrasolar planets and includes plots, tools, and data for offline use.
About Open Exoplanet Catalogue
The Open Exoplanet Catalogue is an open database of discovered extrasolar planets. The website is a front end that displays the data in a browser, while the underlying database is stored as human-readable XML files, with one file per planetary system. The files are versioned with git and hosted on GitHub under an MIT license.
Visitors can browse lists of all extrasolar planets, habitable zone planets, and planets in binary systems. The site also provides correlation plots and histograms, Python scripts for offline plotting, and ASCII tables for those who prefer tabular data. An iPhone application is listed, and the full database can be downloaded for local use. Users can track changes to each value, see scientific paper references in commit messages, and submit corrections through GitHub.
The catalogue suits students, educators, amateur astronomers, and researchers who need open exoplanet data and references for further study.
Key features
- Browse all, habitable-zone, and binary-system planet lists
- View correlation plots and histograms
- Download XML database via GitHub for offline use
- Access ASCII tables and Python plotting scripts
- Submit corrections through GitHub pull requests
- iPhone application listed on the site
Best for: Students, educators, and amateur astronomers who want open exoplanet data with source references.
Good for
- Open data under MIT license
- Change history links values to scientific papers
- Multiple formats: XML, ASCII tables, Python scripts
- Accepts corrections from public and professionals
Watch out for
- ASCII tables omit some binary-system detail
- Contributing and syncing require git and GitHub
Open Exoplanet Catalogue at a glance
- Website
- openexoplanetcatalogue.com
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- iOS, Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Open Exoplanet Catalogue FAQ
What is the Open Exoplanet Catalogue?
It is an open database of discovered extrasolar planets, shown through a browser front end and stored as XML files on GitHub.
How can I download the data for offline use?
The full database can be downloaded from the main GitHub repository as XML files, with ASCII tables available in the oec_tables repository.
How can I contribute corrections?
You can edit the XML files and submit them via GitHub by requesting write access or sending a pull request.
Where do the catalogue values come from?
Git commit messages usually include the scientific paper reference for the data, allowing you to trace each value to its source.
Is something wrong or out of date?
Tell us and an editor will check it.
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