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
V
B-V
U-B
360
( 56)
444
( 13)
556
( 5)
UBV CCD
V
B-V
U-B
32
( 143)
VIc CCD
V
V-I
354
( 101)
byHalpha
V
b-y
y-Ha
449
( 162)
da CCD
V
a
g1-y
Da
35
( 319)
UBV colours
V
B-V
U-B
E(B-V)
12
( 35)