Siril

An open-source astronomical image processing tool for calibrating, stacking and processing astrophotography images.

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About Siril

Siril processes astrophotography images. It covers the full preprocessing chain, starting with calibration to remove unwanted signal and patterns from RAW images, then alignment and stacking of many frames, followed by processing of the final image. Recent news covers solar eclipse processing and integration with RC-Astro tools.

Builds are available for Linux as an AppImage or Flatpak, for Windows as an installer or portable version, and for macOS on Intel and Apple Silicon. It suits amateur astronomers stacking deep-sky or solar images.

Strengths

  • Complete calibration, stacking and processing workflow
  • Builds for Windows, macOS and Linux, including portable Windows
  • Actively developed with regular releases
  • Cited research software with a published paper

Limitations

  • Steep learning curve for people new to astrophotography
  • Some Linux packages have known issues noted on the download page

Details

Pricing
FreeFree and open source; donations are requested on download.
License
GPL-3.0
Developer
The Siril contributors
Platforms
Windows, macOS, Linux
How it runs
Downloadable app
Account
Not required
Works offline
Yes
Best suited for
Amateur astronomers stacking and processing astrophotography images
Last verified
Added
Provenance
Facts checked against the developer's own pages and store listings, 1 sources on file.

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