The StellarMate Plus Manual
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ASTAP is an astrometric plate solver, stacking of images, photometry, and FITS
Viewer application available for Windows, MacOS, and Linux on multiple
architectures.
Ekos included support for solving via ASTAP in the Align module in addition to
the existing astrometry.net solver. ASTAP employs a different method to solve
images making it extremely fast while at the same time requiring a smaller star
catalog compared to other astrometric solvers.
You need to download and install the G17 Star Catalog for ASTAP to work locally.
ASTAP Solver Settings