Cat's Eye Nebula
The Cat's Eye Nebula is a planetary nebula in the northern constellation of Draco, discovered by William Herschel on February 15, 1786. Wikipedia
Radius: 0.2 light years
Magnitude: 9.8
Distance to Earth: 3,262 light years
Coordinates: RA 17h 58m 33s | Dec +66° 38′ 0″
Age: 1,000 years old
Absolute magnitude (V): −0.2+0.8; −0.6B
Apparent dimensions (V): Core: 20″