NGC 1491 is a bright nebula in the constellation of Perseus.

It is a bright emission nebula and HII region, located on the edge of a vast cloud region of neutral gas, about 10,700 light-years away in the Perseus arm of our Milky Way Galaxy in the constellation Perseus.

HII regions are well known for being places where new stars are born, and are created when ultraviolet radiation from hot stars ionizes the surrounding gas, causing it to glow in visible light. The surrounding dust is also heated by this radiation, so we also see it glow in infrared light.

This narrowband image of the brighter part of NGC 1491 was processed in the standard Hubble palette. (Where Hydrogen Alpha is primarily used as Green color, Sulphur is used as Red, and Oxygen is used as Blue).

I took this image over 10.3 hours. 15 Hydrogen alpha, 7 Oxygen & 9 Sulphur images of 20 minutes each were used to capture the narrowband data. Image cropped by about 50%.