De Mairan's Nebula (M43)

De Mairan's Nebula (M43) is a emission nebula in the constellation Orion, with an apparent magnitude of 9.0. It is about 1,600 light-years away.

Finder chart for De Mairan's Nebula (M43) in the constellation Orion
De Mairan's Nebula (M43) (circled) in Orion. Pink symbols mark Messier objects.
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Facts

CatalogMessier 43 (M43)
Typeemission nebula
ConstellationOrion
Apparent magnitude9.0
Distanceabout 1,600 light-years
Right ascension5 h 35.5 min
Declination−5.27°
Best monthJanuary (at about 9 pm)

Sources: star positions, magnitudes and colors from the Yale Bright Star Catalogue; constellation boundaries and star names from the IAU; areas and distances from Wikidata; stick figures by M. van der Sluys. How the maps are made.

How to find De Mairan's Nebula

De Mairan's Nebula is in Orion. From 40° N it is highest in the south in January evenings, about 45° up. From 35° S it reaches about 60° in the north. You need a telescope and a dark sky to see it.

Orion constellation →

Other Messier objects in Orion

Orion Nebula (M42)Messier 78 (M78)

The Messier catalog →

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