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)
 UBV  V    B-V    U-B     435 ( 17)  2030 ( 19)
 DDO data  C4548    C4245    C4142     116 ( 5)
 da CCD  V    a    g1-y    Da  
  32 ( 41)
 UBV pg  V    B-V    U-B     141 ( 226)