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)
 JHK data  J    H    K    J-H  
 H-K    J-K   		  86 ( 73)
 UBV CCD  V    B-V    U-B     460 ( 50)
 VRIc CCD  V    V-R    R-I     460 ( 73)
 RGU data  G    G-R    U-G     6 ( 70)