The tricky line of sight towards Cygnus-X: The [DB2001] CL05 embedded
  cluster as a pilot case
  The nearest massive star-forming complex, Cygnus-X, is widely used as a
laboratory for star cluster formation and feedback processes, under the
implicit assumption that all its components are located roughly at the same
distance. We present a multi-wavelength study of a 15' x 15' field in southern
Cygnus-X, where different components involving clustered star formation are
overlapped. Preliminary results indicate that the Berkeley 87 and [DB2001] CL05
clusters are actually located at very different distances, invalidating
previous claims of physical interaction between them. This shows the importance
of a careful treatment of extinction and distance calculations for cluster
formation studies, particularly in Cygnus-X.
