Messier 43
Messier 43 (also known as M43, De Mairan's Nebula, and NGC 1982) is an H II region in the Orion (Constellation). It was discovered by Jean-Jacques Dortous de Mairan before 1731. The De Mairan's Nebula is part of the Orion Nebula, separated from the main nebula by a lane of dust. It is part of the much larger Orion Molecular Cloud Complex.
References
Found in HGS Manual on Page 108 Found in HGS Manual on Page 115