AFAIK the Shoemaker-Levy impact was useful for other studies, but not so for the density/mass of Jupiter (also as per your link). Jupiter is full of surprises

AFAIK the Shoemaker-Levy impact was useful for other studies, but not so for the density/mass of Jupiter (also as per your link). Jupiter is full of surprises still (mostly about its interior). However, the assessments made in this article about the mass and radius of the planet are using very basic physical laws (mostly Kepler laws from the 1600s).