Object name: PLN84+11
K 4-55 aka PLN84+11 is a planetary nebula between the North American/Pelican Nebula complex and Deneb. A very commonly imaged field yet no one seems to notice this planetary. I couldn't find a distance for it. It is a very red ring with an outlying spiral nebula like structure. The red color is due to ionized Nitrogen (NII) rather than Hydrogen-alpha. A picture from the HST is available at http://www.spacetelescope.org/images/opo0921a/ . For this false-color image, red comes from NII, green from H alpha and blue from ionized oxygen (OIII). You can read more about this nebula at the HST link.