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The Sharpless catalog is a list of 313 emission nebulae (HII regions), intended to be comprehensive north of declination -27°, but it includes some nebulae south of that declination as well.In fact there are more than 313 objects as subsequent research has shown that some of the Sharpless nebulae consist of more than one object. Stewart Sharpless published the first edition in 1953 with 142 objects (Sh1), and the second and final version was published in 1959 with 313 objects (Sh2). The items in the Sharpless overlap with objects from many other catalogs including Messier (M), New General Catalogue (NGC), Index Catalogue (IC) Caldwell catalogue ,RCW catalog etc. A similar catalog covering the southern hemisphere was published by Alex Rodgers, Colin Campbell, and John Whiteoak in 1960, which is largely an expansion of Colin Gum's earlier catalog.

Sh2-8 (NGC 6334) Sh2-25 (M 8) Sh2-29 Sh2-30 (M 20)
Sh2-31 Sh2-32 Sh2-45(M 17) Sh2-49 (M 16) Sh2-82
Sh2-86 (NGC 6820) Sh2-101 Sh2-103 (The Cygnus Loop) Sh2-105 (NGC 6888) Sh2-108 (Gamma Cygni Nebula)
Sh2-115 Sh2-116 Sh2-117 (NGC 7000 & IC 5067) (part of) Sh2-131 (IC 1396) Sh2-140
Sh2-142 (NGC 7380) Sh2-155 Sh2-158 (NGC 7538) Sh2-159 Sh2-162 (NGC 7635)
Sh2-170 Sh2-170 (NGC 7822) Sh2-184 (NGC 281) Sh2-190(IC 1805) Sh2-199 ( IC 1848)

Sh2-201 Sh2-220 (NGC 1499) Sh2-229 (IC 405) Sh2-236 (IC 410) Sh2-240 (Simeis 147)
Sh2-242 Sh2-244 (M 1) Sh2-244 (IC 443) Sh2-252 (INGC 2174) Sh2-273 (NGC 2264)
Sh2-275 (NGC 2237) Sh2-276 Sh2-277 (NGC 2024) Sh2-279 (NGC 1977) Sh2-281 (M 42)
     
Sh2-292 (part of IC 2177) Sh2-298 (NGC 2359)      

 

 
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