C2A natively includes the UBVRI
photometry of faint field stars generally called Loneos
which lets you do photometry on fields. This catalogue, originally prepared
to meet the needs of the Lowell Observatory
Near-Earth Object Search (LONEOS) programme, contains a
Johnson-Cousins UBVRI photometric collection. More information is available
on the CDS Strasbourg site (II/277).
The catalogue contains 34,071 objects.