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De Mairan's Nebula

M43, NGC 1982

Proper NameDe Mairan's Nebula
Messier NumberM43 (associated with M42, the Orion Nebula)
NGC/IC NumberNGC 1982 (associated with NGC 1976)
ConstellationOrion
Right Ascension5h 35m 31s
Declination-5° 16' 12"
Distance1,300 light years
400 parsecs
MagnitudeApparent: +9.0
Absolute: +0.3
DimensionsApparent: 20' x 15'
Actual diameter: 10 light years
Associated Star(s)NU Orionis
Optimum VisibilityDecember / January
NotesThis small nebula represents a northern part of the larger Orion Nebula (M42), divided from the main body of that nebula by a dark lane of dust. A further line of dust, the M43 dark lane, runs from north to south across the eastern face of De Mairan's Nebula.

Imagery provided by Aladin sky atlas

Closely associated with the Orion Nebula (M42), M43 is a bright nebula in its own right, illuminated by a blue dwarf star, NU Orionis.

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