One can get statistical information on several topics.
For each data file, one can obtain the number of stars observed for each reference, using the option -d:
> ngc 0129
> ubv -d detailed content
> ubv -d 10 detailed content, sources with more than 10 stars
> ubv -dr detailed content and references
One can also obtain the number of data sources per star, and fix some cutoff level if necessary:
> ubv -nb
> ubv -nb 3 select only those stars which have more than three UBV sources.
One can also get global information on the database content:
> stcn ubv display the number of stars and UBV measurements.
> stcn bda display a complete table of the database content.