Kronberger 24 (Kn 24) is a planetary nebula in the constallation Cygnus with a diameter of 190 arc seconds. It was discoverd by Matthias Kronberger, member of "Deep Sky Hunters", a group of amateur astronomers, searching for unknown objects in DSS images. Kn 24 was listed as a probable and confirmed PN in this paper.
Sakib Rasool suggested this target which required long exposed Ha and OIII to bring out some details. North is up in this image.