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
1082
( 22)
1513
( 23)
2030
( 11)
DDO data
C4548
C4245
C4142
116
( 10)
UBV CCD
V
B-V
U-B
1
( 62)
32
( 74)
uvby CCD
V
b-y
m1
c1
333
( 374)
da CCD
V
a
g1-y
Da
33
( 98)
UBV pg
V
B-V
U-B
119
( 150)
120
( 78)