The COSMOS survey has blended a brighter star with the faint object
which is the identification, coincident with the accurate radio
position. This faint object is probably extended on IIIa-J - but
needs CCD imaging for confirmation.
1758-651: Triple optical image. There is evidence of structure connecting
the optical counterpart to a bright pair of objects to the north. This
could explain the fairly high radio-optical DEC residual obtained, which
is consistent with that obtained by Zacharias.