• Over 50,000 Observations
  

  Rod Stubbings	Australia	1997-2002	55,053
  Jean Gunther	France	1981-2002	52,239

• Over 25,000 Observations
  

   Maciej Reszelski         Poland        2000-2002    38,318
   Libert A. G. Monard      South Africa  1992-2002    29,480
   Ronald E. Zissell        USA           1985-2002    27,871
   Miroslav A. Komorous     Canada        1976-2002    27,034
   James Molnar             USA           1966-2002    26,459
   Christopher Stephan      USA           1973-2002    26,424
   Andrei Sajtz             Romania       1987-2002    25,030
  

• Over 10,000 Observations
  

   Shawn W. Dvorak          USA           1981-2002    23,529
   Christopher Jones        England       1999-2002    11,640
   Guy M. Hurst             England       1974-2002    11,365
   Joerg Neumann            Germany       1993-2002    11,121
   Daniel B. Taylor         Canada        1987-2002    10,600
   Donn Ray Starkey         USA           2001-2002    10,226
   Michel Dumont            France        1983-2002    10,182
   Hazel McGee              England       1998-2002    10,059
  

• OVER 25,000 OBSERVATIONS PEP OR CCD OBSERVATIONS*
  

  Gerard Samolyk           USA           1975-2002    25,041 CCD
  

• OVER 10,000 PEP OR CCD OBSERVATIONS*
  

   Shawn W. Dvorak          USA           1981-2002    16,993 CCD
   Gilbert C. Lubcke        USA           1966-2002    12,025 CCD
   Roger Diethelm           Switzerland   1966-2002    10,988 CCD
   Donn Ray Starkey         USA           2001-2002    10,226 CCD
  

• OVER 5,000 PEP OR CCD OBSERVATIONS*
  

   Andy Howell              USA           1964-2002     8,813 CCD
   Robert A. James          USA           1953-2002     7,498 CCD
   Ladislav Smelcer         Czech Republic 1995-2002    7,401 CCD
   Thomas J. Richards       Australia     1992-2002     6,303 CCD
   Arto Oksanen             Finland       2001-2002     5,493 CCD
   Charles W. Robertson     USA           2001-2002     5,442 CCD
  

• OVER 2,500 PEP OR CCD OBSERVATIONS*
  

  Michael Koppelman        USA           2001-2002     2,522 CCD
  

• OVER 1,000 PEP OR CCD OBSERVATIONS*
  

  Gary Walker              USA           1994-2002     1,522 CCD
   Keith A. Graham          USA           1981-2002     1,448 CCD
   Jerry Doug West          USA           1987-2002     1,421 CCD
   Frank L. Scheder         USA           2000-2002     1,379 CCD

* Years include total AAVSO observing interval (not only PEP or CCD observing). Total includes PEP and/or CCD observations only (not observer's visual contributions).