He observed it pass close to Jupiter and its moons and since the moons were unaffected Lexell deduced that, despite the large size of comets, their mass was extremely low.
Siya napagmasdan na ito pumasa malapit sa Jupiter at ang Buwan at dahil sa ang Buwan ay hindi tinatablan Lexell deduced na, sa kabila ng malaking sukat ng comets, ang kanilang mga masa ay lubhang mababa.