I don't know what to call this one. A Dark Nebula? A Reflection Nebula? In the literature, it is called a "Photo Dissociation Area". It is a cloud of gas being illuminated by the bright star Markab in Pegasus. There is no narrowband contribution from this gas cloud. Colour is muted but one needs a LOT of luminance data to tease out any structure. It is FAINT. There are a TON of faint galaxies in the background if you want a challenge!

Scope: AP155EDF w 4" Field Flattener and Focus Boss II motorized focuser
Camera: Moravian G4 w Astrodon Gen II filters
Mount: Paramount MX guided w an SBIG ST-402ME and Borg 60mm guidescope
48 x 10 min of Luminance; 15 x 10 min each of RGB
Acquired with CCD-Commander and TheSkyX
Calibration and colour combine in PixInsight
Further processing including the blending of the Luminance into the RGB in PS CC