Past affiliation(s) within the IAU

• Past President of Commission 15 Physical Study of Comets & Minor Planets (1979-1982)
• Past Vice-President of Commission 15 Physical Study of Comets & Minor Planets (1976-1979)
• Past Organizing Committee Member of Commission 15 Physical Study of Comets & Minor Planets (1982-1985)
• Past Organizing Committee Member of Commission 34 Interstellar Matter (1979-1982)
• Past Organizing Committee Member of Commission 15 Physical Study of Comets & Minor Planets (1973-1976)
• Past Member of Division F Planetary Systems and Astrobiology
• Past Member of Division H Interstellar Matter and Local Universe
• Past Member of Division III Planetary Systems Sciences (until 2012)
• Past Member of Division VI Interstellar Matter (until 2012)
• Past Member of Commission 15 Physical Study of Comets & Minor Planets (until 2012)
• Past Member of Commission 34 Interstellar Matter (until 2012)