NGC 1491 NGC 1491 - Fossil Footprint Nebula

Also known as SH2-206 or LBN 704, is an emission-type nebula in Perseus. The red color is due to the Hydrogen in the nebula which is energized by hot stars embedded in that emits strong UV radiation.

The image is a composed LRGB picture taken in 2 different observatories

Image details:

Telescope: RC 12" F/9 reduced to F/7
Camera: Moravian CCD G2 3200 - KAF 3200ME
Filters: LRGB Astronomik
L:36x600" (Trivolzio Observatory - Italy)
R:12x600" G.12x600" B:12x600" (Brallo Observatory - Italy)