Keynote lecture SB:

Title: "Highlights of Hayabusa 2 sample return mission"

Speaker: Patrick Michel

Abstract:
The Hayabusa2 mission by JAXA has been extremely successful in its complex operations from launch in 2014 to the return of samples of the asteroid Ryugu to Earth in 2020. The review will present the main operations and results of this mission during its visit to Ryugu and from the sample analysis, and what they tell us about the complex and counter-intuitive behavior and properties of asteroids and the Solar System history.

Keynote lecture TP:

Title: "An estimate of the impact rate on Mars from statistics of very-high-frequency marsquakes"

Speaker: Natalia Wojcicka

Abstract:
The number density of impact craters on a planetary surface is used to determine its age, which requires a model for the production rate of craters of different sizes. Here we provide a new independent estimate of the impact rate by analysing the Very High Frequency (VF) seismic events recorded by the seismometer onboard NASA’s InSight lander. We show that the VF class as a whole is plausibly caused by meteorite impacts and derive a global impact rate. We find that 280–360 craters >8 m diameter are formed globally per year, consistent with previously published chronology model rates and above the rates derived from freshly imaged craters. Our work shows that seismology is an effective tool for determining meteoroid impact rates and complements other methods such as orbital imaging.