Datatype: UBVHRD

This datatype is a variant collecting the dereddened magnitudes and colours when authors have explicitely deredden the stars individually. This is essential for clusters with differential reddening. However, the number of clusters for which dereddened data are available is still small.

Such data are mostly useful to plot HR diagrams, which justifies the datatype designation.

Record structure

No:Star number
V:Vo magnitude
B-V:(B-V)o colour index
U-B:(U-B)o colour index
E(B-V):B-V colour excess
E(U-B):U-B colour excess

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Last Update: 17 February 1998