Aleksander Brzeziński, Chopo Ma, Véronique Dehant, Pascale Defraigne, Jean O. Dickey, Cheng-Li Huang, Jean Souchay, Jan Vondrák, Patrick Charlot, Bernd Richter and Harald Schuh
The IAU Commission 19 meeting during the XXVII IAU General Assembly in Rio de Janeiro was held on Wednesday 5 August 2009, sessions 3 (14:00–15:30) and 4 (16:00–17:30). It was attended by about 40 participants. The meeting was split into three sessions.