To make a plot
Select one or two photometric systems,
Select one or two parameters,
Select one or two data sources,
Click on "Plot".
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System
Parameters
Data sources (Number of stars)
UBV CCD
V
B-V
U-B
368
(4076)
495
(2280)
VRIc CCD
V
V-R
R-I
368
(6025)
VIc CCD
V
V-I
368
(6025)