NGC 6543 – Cat’s Eye Nebula
NGC 6543, the Cat’s Eye Nebula is located in the constellation Draco about 3,000 light-years away. It is the result of a star that has burned all its gas and ejected a shell of ionized gas about 1,000 years ago.
The green and blue colors indicate the strong presence of doubly ionized oxygen and hydrogen-alpha since narrow bandwidth filters in these precise wavelengths were used to best reveal this nebula.
Telescope: Celestron Edge HD14 with 0.7x focal reducer
Camera: ZWO ASI 2600MM
Filters Baader 2-inch RGB and narrowband filters
Exposure: 30 x 6 minutes with RGB filters and 80 x 10 minutes with SII (assigned to red), H-alpha (assigned to green) and Oxygen III (assigned to blue)