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
1144
( 13)
Washington CCD
T1
C-M
M-T1
T1-T2
C-T1
M51
524
(1162)
UBV pg
V
B-V
U-B
216
( 434)
227
( 26)
RGU data
G
G-R
U-G
9
( 257)