Datatype: uvby

This datatype collects the numerous photoelectric photometric observations of stars in open clusters made in the Strömgren uvby system. Clusters have often been observed to develop the calibration of the system, which partly explains the list of the observed clusters.

The uvby data are most often associated with observations of the Hydrogen Balmer ß line (uvby ß). As ß data are found in many publications, sometimes associated with UBV data, they are collected separately in the database. The corresponding datatype is beta.

Record structure

No:Star number
V:V magnitude
b-y:b-y colour index
m1:m1 parameter
c1:c1 parameter
N:Number of measurements

Database access

List of clusters

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Last Update: 17 February 1998