Version 2.28.0 is available upstream. Please consider updating! It seems that version 2.28.0 is available upstream, while the latest version in the Gentoo tree is 2.19.5-r1. You think this warning is false? Read more about it here.
SExtractor (Source Extractor) is a program that builds a catalogue of
objects from an astronomical image. Although it is particularly
oriented towards reduction of large scale galaxy-survey data, it
performs rather well on moderately crowded star fields. It has the
ability to automatically separate stars and galaxy using neural
networks.