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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Cluster page
System
Parameters
Data sources (Number of stars)
UBV
V
B-V
U-B
377
( 5)
385
( 24)
534
( 46)
1046
( 15)
UBV pg
V
B-V
U-B
273
( 42)
274
( 59)
UBV colours
V
B-V
U-B
E(B-V)
9
( 87)