To make a plot

  1. Select one or two photometric systems,
  2. Select one or two parameters,
  3. Select one or two data sources,
  4. Click on "Plot".

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SystemParametersData sources (Number of stars)
 Washington CCD  T1    C-M    M-T1    T1-T2  
 C-T1    M51  
  523 ( 862)
 BV-ASCC  V    B-V     2 ( 34)