Datatype: UBVpe

From 1953 on, the UBV photoelectric photometric system has been used to measure the apparent magnitude and colours of stars in many clusters. It has produced the best colour-magnitude diagrams. The UBV data stored in the datbase come both from specific studies and from larger surveys of fields stars. This is especially true for the brighter stars of each cluster.

The number of measurements has to be completed. 0 simply means that the information is still absent.

Record structure

No:Star number
Ref:Data source
V:V magnitude
B-V:B-V colour index
U-B:U-B colour index
N:Number of measurements

Database access

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Last Update: 17 February 1998