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
438
( 31)
Geneva
V
U-B
B-V
U-B1
B2-V1
d
delta
m2
g