The Sharpless catalog
Contents within planetarium
- 313 hII regions
Overlap with other object catalogs
- 8 Lynds' catalogue of bright nebulae
- 6 Van den Bergh catalogue of reflection nebulae
- 6 PK planetary nebulae
- 3 Strasbourg-ESO Catalogue of Galactic Planetary Nebulae
- 1 Caldwell objects