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)
JHK data
J
H
K
J-H
H-K
J-K
86
( 150)
UBV CCD
V
B-V
U-B
445
( 137)
VRIc CCD
V
V-R
R-I
445
( 140)
da CCD
V
a
g1-y
Da
36
( 42)