This is the open cluster NGC 2244 at the center of the Rosette Nebula and a detail view of the southern part of the nebula. The super hot O-type stars of NGC 2244 generate intense radiation and stellar wind to shape the Rosette Nebula. Their influence is apparent in this part of the nebula with bow shocks and long columns of interstellar gas and dust.
After capturing a view of the entire Rosette Nebula with an Esprit 100ED, this part of the nebula caught my attention. The extra reach of the 10" Newtonian from Sidereal gives a good close up of the area.
A bigger version is on
Astrobin