Past affiliation(s) within the IAU

• Past President of Commission 22 Meteors, Meteorites & Interplanetary Dust (1982-1985)
• Past Vice-President of Commission 22 Meteors, Meteorites & Interplanetary Dust (1979-1982)
• Past Organizing Committee Member of Commission 22 Meteors, Meteorites & Interplanetary Dust (1988-1991)
• Past Organizing Committee Member of Commission 22 Meteors, Meteorites & Interplanetary Dust (1985-1988)
• Past Member of Division F Planetary Systems and Astrobiology (until 2020)
• Past Member of Division J Galaxies and Cosmology (until 2020)
• Past Member of Commission F1 Meteors, Meteorites and Interplanetary Dust (2015-2020)
• Past Member of Commission 21 Galactic and Extragalactic Background Radiation (until 2015)
• Past Member of Commission 22 Meteors, Meteorites & Interplanetary Dust (until 2015)
• Past Member of Division III Planetary Systems Sciences (until 2012)