The Gum catalog is an astronomical catalog of 84 emission nebulae in the southern sky. It was made by the Australian astronomer Colin Stanley Gum (1924-1960) at Mount Stromlo Observatory using wide field photography. Gum published his findings in 1955 in a study entitled A study of diffuse southern H-alpha nebulae which presented a catalog of 84 nebulae or nebular complexes. Similar catalogs include the Sharpless catalog and the RCW catalog, and many of the Gum objects are repeated in these other catalogs. However, the RCW and Gum catalogs were mainly of the southern hemisphere (Mount Stromlo is in the southern hemisphere)
The Gum Nebula is named for Gum, who discovered it as Gum 12; it is an emission nebula that can be found in the southern constellations Vela and Puppis.
| Gum | A common name | Images | Names & Designations |
|---|---|---|---|
| Gum 4 | Thor's Helmet, Gum 4, Sharpless 298, NGC 2359 | ||
| Gum 12 | Gum 12, The Gum Nebula in Vela and Puppis | ||
| Gum 15 | Gum 15, Star Formation Region | ||
| Gum 16 | Gum 16, Vela Supernova Remnant | ||
| Gum 20 | RCW 36 | ||
| Gum 29 | Gum 29, RCW 49 | ||
| Gum 60 | Sh2-6, NGC 6302, Bug Nebula,PK 349+01 1, Butterfly Nebula, RCW 124, Caldwell 69 | ||
| Gum 64 | ESO 392-EN 009, Sharpless 8, RCW 127, Gum 64, NGC 6334 | ||
| Gum 66 | Sh2-11, NGC 6357, RCW 131, Gum 66, War and Peace Nebula | ||
| Gum 72 | Sh2 25, RCW 146, Gum 72, Messier 8 | ||
| Gum 76 | Trifid Nebula | Sh2 30, Messier 20, NGC 6514, RCW 147, Gum 76 | |
| Gum 81 | Omega Nebula, Messier 17, NGC 6618, Swan Nebula, Sharpless 45, RCW 160, Gum 81 | ||
| Gum 83 | Sh2 49, Messier 16, NGC 6611, RCW 165, Gum 83 | ||