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JnEr — Jones-Emberson (planetary nebulae) (for example: Jones-Emberson 1 in Lynx, also known as the Headphone nebula) Jo — Jones (double stars) Johansson — (open star clusters) (for example: Johansson 1 at 15:46:20 / -52:22:54 in Norma) Joy — Alfred Harrison Joy (double stars) Jsp — Morris Ketchum Jessup (double stars)
The GC contained 5,079 entries. Later, a complementary edition of the catalog was published posthumously as the General Catalogue of 10,300 Multiple and Double Stars. The small "h" followed with the catalogue entry number represented the item. [4] In 1878, John Louis Emil Dreyer published a supplement to the General Catalogue. [6]
Caldwell advocates, however, see the catalog as a useful list of some of the brightest and best known non-Messier deep-sky objects. Thus, advocates dismiss any "controversy" as being fabricated by older amateurs simply not able or willing to memorize the new designations despite every telescope database using the Caldwell IDs as the primary ...
For example, Messier 1 is a supernova remnant, known as the Crab Nebula, and the great spiral Andromeda Galaxy is M31. Further inclusions followed; the first addition came from Nicolas Camille Flammarion in 1921, who added Messier 104 after finding Messier's side note in his 1781 edition exemplar of the catalogue.
The New General Catalogue of Nebulae and Clusters of Stars (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and emission nebulae.
The Medusa Nebula is one of the planetary nebulae of the Abell Catalog. [ edit on Wikidata ] The Abell Catalog of Planetary Nebulae was created in 1966 by George O. Abell and was composed of 86 entries thought to be planetary nebulae that were collected from discoveries, about half by Albert George Wilson and the rest by Abell, Robert George ...
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The Gum catalog is an astronomical catalog of 84 emission nebulae in the southern sky. ... Omega Nebula, Messier 17, NGC 6618, Swan Nebula, Sharpless 45, RCW 160, Gum 81
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