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1
Sharpless 2-290, also called Abell 31, is an ancient planetary nebula in Cancer, distinguished by its large, faint shell interacting with interstellar gas.
2
Sharpless 2-216 is an ancient planetary nebula in Perseus, notable as the nearest known planetary nebula at about 420 light-years from Earth.
3
Sharpless 2-68 is an ancient planetary nebula in Serpens, notable for a long tail formed through interaction with the surrounding interstellar medium.
4
Kohoutek 1-16 is a faint planetary nebula in Draco, notable for its extremely hot pulsating central star, the white dwarf DS Draconis.
5
Abell 24 is a large, faint planetary nebula in Canis Minor, cataloged by American astronomer George Abell in his 1966 planetary-nebula survey.
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