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
183
(1534)
VIc CCD
V
V-I
183
(1534)
OGLE
V
B-V
V-I
sV
sB-V
sV-I
ID
183
(2202)