M43 (NGC 1982) - De Mairan's Nebula
Messier 43 (NGC 1982), also known as the De Mairan's Nebula, is a diffuse nebula located in the constellation Orion, in the Orion Arm of the Milky Way Galaxy in the Local Group of galaxies.
M43 is best viewed during winter, is magnitude 7.0*, and can be viewed with binoculars. It is 20 x 15' in size. For reference, the full moon is 30' (arc minutes) in size.
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.