Seestar FITS analysis software: why Seestar Companion is more than a viewer
Many tools can open a FITS file. Seestar Companion is built for a different job: understanding whether a session is worth stacking, which frames deserve attention and how the data behaves while the night is still in progress.
The problem is not only opening FITS files
A FITS viewer can show an image. That is useful, but it does not answer the questions a real session creates: are the frames improving, is the stack likely to be worth it, are clouds or tracking problems hurting the data, and should the user keep going or change target?
Seestar Companion is built around those decisions. It supports Seestar workflows, but Universal FITS mode also allows analysis of any valid FITS dataset.
What makes Seestar Companion different
- Universal FITS analysis, not only fixed Seestar folder assumptions.
- Live session monitoring for evaluating a folder while capture is still happening.
- Frame quality and stack-decision guidance rather than a simple image preview.
- Archive and local benchmark context, so a session can be judged against your own history.
- A focused Windows and macOS product that stays lightweight instead of becoming a full processing suite.
Who should care
Seestar users are the obvious audience, but they are not the only audience. Anyone collecting valid FITS files can use Universal FITS mode to inspect data, compare sessions and make better decisions before committing to a long processing path.