  On 7th August 2019, an impact flash lasting $\sim1$s was observed on Jupiter.
The video of this event was analysed to obtain the lightcurve and determine the
energy release and initial mass. We find that the impactor released a total
energy of $96-151$ kilotons of TNT, corresponding to an initial mass between
$190-260$ metric tonnes with a diameter between $4-10$m. We developed a
fragmentation model to simulate the atmospheric breakup of the object and
reproduce the lightcurve. We model three different materials: cometary, stony
and metallic at speeds of $60$, $65 $ and $70$ km/s to determine the material
makeup of the impacting object. The slower cases are best fit by a strong,
metallic object while the faster cases require a weaker material.
