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
286
( 24)
550
( 59)
821
( 19)
Washington
T1
C-M
M-T1
T1-T2
M51
38
( 21)
UBV CCD
V
B-V
U-B
327
( 19)
uvby CCD
V
b-y
m1
c1
408
(1659)
ß CCD
Hbeta
408
( 604)
UBV pg
V
B-V
U-B
11
( 135)
67
( 264)