A WP120 meeting with the leaders of the WP12X took place on the 23rd and 24th of May.

Location: Observatoire de Paris, site de Meudon - 5, place Jules Janssen, F-92195, Meudon cedex

(https://www.obspm.fr/aes-au-site-de-meudon.html, frensh/english option in the up-per right corner)

Objetives of the meeting

The goal of the meeting was scientific discussions focused on four specific topics (therefore corresponding to four sessions):

- Stellar activity

- Seismology of main sequence stars

- Surface convection

- Benchmark stars for PLATO

The idea was to go a step further than what was already provided in 2015. Each major WP under WP12 presented an update on their activity to date. Results from a recent Hare & Hounds exercise were presented, and showed encouraging progress towards the determination of stellar parameters to the required precision. Discussion also took place concerning the interfaces between the Stellar Science WP12 and Exoplanet Science WP11, in the main regarding the different features and requirements of each side.