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- Q2565783 subject Q7111923.
- Q2565783 subject Q8273037.
- Q2565783 subject Q8735551.
- Q2565783 abstract "The Sharpless catalog is a list of 313 HII regions (emission nebulae), intended to be comprehensive north of declination -27°. (It does include some nebulae south of that declination as well.) The first edition was published in 1953 with 142 objects (Sh1), and the second and final version was published by US astronomer Stewart Sharpless in 1959 with 312 objects. Sharpless also includes some planetary nebulae and supernova remnants, in addition to HII regions.In 1953 Stewart Sharpless joined the staff of the United States Naval Observatory Flagstaff Station, where he surveyed and cataloged H II regions of the Milky Way using the images from the Palomar Sky Survey. From this work Sharpless published his catalog of H II regions in two editions, the first in 1953 with 142 nebula. The second and final edition was published in 1959 with 312 nebulae.Sharpless coordinates are based on the star catalogs Bonner Durchmusterung (BD) and Cordoba Durchmusterung (CD), but the second release was adjusted to the 1900 epoch.In the second release, some coordinates for southern hemisphere regions have an uncertainty over 1 minute of arc. This can make them difficult to find, so a revised catalog called BFS (Blitz, Fich and Stark) was released. BFS has 65 new regions and about 20 removals. Most of the removed items were taken out because they were the aforementioned nebula or remnants.The 312 items in Sharpless sometimes overlap with the 110 Messier objects (M), 7,840 objects in the New General Catalogue (NGC), the Caldwell catalogue (that itself is a "best of" from other catalogues, with 109 items), and the RCW catalog. Contemporary catalogs were Gum and RCW, but they mainly covered the southern hemisphere.".
- Q2565783 thumbnail Sharpless_2-106.jpg?width=300.
- Q2565783 wikiPageExternalLink 20.
- Q2565783 wikiPageExternalLink sharpless.py?s=1.
- Q2565783 wikiPageExternalLink sim-ref?bibcode=1959ApJS....4..257S&simbo=on&submit=submit%20bibcode.
- Q2565783 wikiPageExternalLink sharpless.aspx.
- Q2565783 wikiPageWikiLink Q108041.
- Q2565783 wikiPageWikiLink Q10934.
- Q2565783 wikiPageWikiLink Q11282.
- Q2565783 wikiPageWikiLink Q1196507.
- Q2565783 wikiPageWikiLink Q1339333.
- Q2565783 wikiPageWikiLink Q13411059.
- Q2565783 wikiPageWikiLink Q13632.
- Q2565783 wikiPageWikiLink Q13903.
- Q2565783 wikiPageWikiLink Q1425489.
- Q2565783 wikiPageWikiLink Q1479861.
- Q2565783 wikiPageWikiLink Q2032780.
- Q2565783 wikiPageWikiLink Q207436.
- Q2565783 wikiPageWikiLink Q21067798.
- Q2565783 wikiPageWikiLink Q2355688.
- Q2565783 wikiPageWikiLink Q2721889.
- Q2565783 wikiPageWikiLink Q321.
- Q2565783 wikiPageWikiLink Q42372.
- Q2565783 wikiPageWikiLink Q4439554.
- Q2565783 wikiPageWikiLink Q490342.
- Q2565783 wikiPageWikiLink Q494019.
- Q2565783 wikiPageWikiLink Q654724.
- Q2565783 wikiPageWikiLink Q7111923.
- Q2565783 wikiPageWikiLink Q808444.
- Q2565783 wikiPageWikiLink Q8273037.
- Q2565783 wikiPageWikiLink Q832978.
- Q2565783 wikiPageWikiLink Q835928.
- Q2565783 wikiPageWikiLink Q841306.
- Q2565783 wikiPageWikiLink Q8735551.
- Q2565783 comment "The Sharpless catalog is a list of 313 HII regions (emission nebulae), intended to be comprehensive north of declination -27°. (It does include some nebulae south of that declination as well.) The first edition was published in 1953 with 142 objects (Sh1), and the second and final version was published by US astronomer Stewart Sharpless in 1959 with 312 objects.".
- Q2565783 label "Sharpless catalog".
- Q2565783 depiction Sharpless_2-106.jpg.