Such a file has not been prepared for all clusters. It has been set up mostly when
many sources of UBV data had to be combined. Otherwise, CM diagrams can be easily
plotted from UBV pg or CCD data.
Record structure
No | : | Star number |
---|---|---|
Ref | : | Number of sources or references |
V | : | V magnitude |
B-V | : | B-V colour index |
U-B | : | U-B colour index |