Install sextractor by entering the following commands in the terminal:
sudo apt update sudo apt install sextractor
Description:
Source extractor for astronomical images
Find sources, such as stars and galaxies, in astronomical images. The input data files are in FITS file format, and are analyzed to compute the locations of sources, with the ability to distinguish between galaxies and stars using a neural-network technique.
Homepage: http://www.astromatic.net/software/sextractor
Version: 2.19.5+dfsg-5
Section: universe/science