Generally, the published magnitudes and colors are based on a small number of plates, and the scatter in the photometric diagrams is rather large.
These data provide a rough definition of the cluster characteristics and
of the non-members, but they do not allow a distance and age determination
precise enough by present standard. There is however a number of clusters
that have not been observed in other photometric systems.
Record structure
| No | : | Star number |
|---|---|---|
| Ref | : | Data source |
| G | : | G magnitude |
| G-R | : | G-R colour index |
| U-G | : | U-G colour index |