Past affiliation(s) within the IAU

• Past President of Commission 16 Physical Study of Planets & Satellites (1979-1982)
• Past Vice-President of Commission 16 Physical Study of Planets & Satellites (1976-1979)
• Past Organizing Committee Member of Commission 16 Physical Study of Planets & Satellites (1991-1994)
• Past Organizing Committee Member of Commission 16 Physical Study of Planets & Satellites (1988-1991)
• Past Organizing Committee Member of Commission 16 Physical Study of Planets & Satellites (1985-1988)
• Past Organizing Committee Member of Commission 16 Physical Study of Planets & Satellites (1982-1985)
• Past Organizing Committee Member of Commission 16 Physical Study of Planets & Satellites (1973-1976)
• Past Organizing Committee Member of Commission 16 Physical Study of Planets & Satellites (1970-1973)
• Past Member of Division III Planetary Systems Sciences (until 2012)
• Past Member of Division D High Energy Phenomena and Fundamental Physics (until 2018)
• Past Member of Division F Planetary Systems and Astrobiology (until 2018)
• Past Member of Division XI Space & High Energy Astrophysics (until 2012)
• Past Member of Commission 15 Physical Study of Comets & Minor Planets (until 2015)
• Past Member of Commission 16 Physical Study of Planets & Satellites (until 2015)
• Past Member of Commission 44 Space & High Energy Astrophysics (until 2015)
• Past Member of Division F WG Planetary System Nomenclature (WGPSN) (2006-2018)