Past affiliation(s) within the IAU

• Past Organizing Committee Member of Commission 15 Physical Study of Comets & Minor Planets (1988-1991)
• Past Organizing Committee Member of Commission 15 Physical Study of Comets & Minor Planets (1985-1988)
• Past Member of Commission 15 Physical Study of Comets & Minor Planets
• Past Member of Division C Education, Outreach and Heritage (until 2017)
• Past Member of Division F Planetary Systems and Astrobiology (until 2017)
• Past Member of Commission 20 Positions & Motions of Minor Planets, Comets & Satellites (until 2015)
• Past Member of Commission 41 History of Astronomy (2003-2015)
• Past Member of Division III Planetary Systems Sciences (until 2012)
• Past Member of Division XII Union-Wide Activities (until 2012)

Other past affiliation(s)

• Past Chair of the National Committee for Astronomy in Austria (until 2011)