NGC 7497, etc.

North is up (aprox). 0.53 "/pixel. [24' x 23' field] FWHM = 3.75" A relatively unremarkable spiral galaxy... but hey, what's that in the background? Click to toggle annotations. (needs JS) Well, it's not actually in the background: the nebula is closer than the galaxy. This particular reflection nebulously is unusual because it's quite far from the milky way, and it doesn't have a central star. The light source here is actually the combined light of the milky way, hence "Integrated Flux Nebula". This dim illumination means it has an unusually low surface brightness: the brightest region visible in my image is 26th mag/arcsec2. Total exposure time:56 * 30 seconds = 28 minutes. Used in stack:50 * 30 seconds = 25 minutes. Telescope: C9.25 (230mm, f/10, fl=2300mm) + 0.63 Starizona reducer Camera: IMX533 (16mm diagonal, square, color) Processing: Calibration (dark + flat) and debayer Stacking (average w/ outlier rejection) White balance and background subtraction (no gradient removal)…