To say that a kind is natural, rather than artificial or arbitrary, means, minimally, that it reflects some relevant aspects of the world and not only the interests of, or facts about, the classifiers. The expression “footwear under $100,” for instance, describes an artificial kind reflecting some categorizer’s interest—their budget—and not some relevant feature of the classified objects.
Are constellations "artificial kinds"? They are definitely ways of carving up the world: but does that occur "at the joints"?
If not, then does that mean a constellation depends on subjects in order to exist?