Past affiliation(s) within the IAU

• Past President of Commission 6 Astronomical Telegrams (2000-2003)
• Past Vice-President of Commission 6 Astronomical Telegrams (1997-2000)
• Past Vice-President of Commission 6 Astronomical Telegrams (1994-1997)
• Past Secretary of Executive Committee WG Small Bodies Nomenclature (SBN) (2009-2012)
• Past Secretary of Executive Committee WG Small Bodies Nomenclature (SBN) (2006-2009)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (2009-2012)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (2006-2009)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (2003-2006)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (1991-1994)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (1988-1991)
• Past Organizing Committee Member of Commission 6 Astronomical Telegrams (1985-1988)
• Past Member of Division I Fundamental Astronomy
• Past Member of Division III Planetary Systems Sciences
• Past Member of Division XII Union-Wide Activities
• Past Member of Commission 7 Celestial Mechanics & Dynamical Astronomy
• Past Member of Commission 15 Physical Study of Comets & Minor Planets
• Past Member of Commission 20 Positions & Motions of Minor Planets, Comets & Satellites
• Past Member of Commission 41 History of Astronomy
• Past Member of Commission 6 Astronomical Telegrams (1985-2010)
• Past Member of Executive Committee WG Planetary System Nomenclature (WGPSN) (2006-2009)
• Past Member of Executive Committee WG Small Bodies Nomenclature (SBN) (2007-2009)
• Past Member of Special Nominating Committee (1994-1997)