The impacts of Comet Shoemaker-Levy 9 left spots on Jupiter with diame
ters on the order of tens of thousands of kilometers, which have the a
ppearance of debris fields strewn upon the Jovian cloud In this note w
e employ a measurement of the optical depth of the debris at the impac
t site of fragment G to estimate mass in the debris field and lower li
mits to the G fragment mass of 4x10(12) - 4x10(13) g and diameter of 0
.1 - 0.3 km.