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... М42 < М43 > М44 ...

Emission nebula M43

Emission nebula M43 or De Mairan's, part of M42 nebula is in the constellation Orion (Ori).


Equatorial coordinates (epoch J2000):
Ra 05h 35.5m, Dec -05° 16'

Visual magnitude: 7,0m
Distance to the nebula M43 to the Sun is 1600 light years
Angular size: 20'x15'

Discoverer: Jean-Jacques d'Ortous de Mairan, before 1731 year.

The designation M43 in other catalogs: NGC 1982

Optimum magnification for a telescope with observations of M43, depending on the aperture of the telescope (D), is about D/6-D/2. Higher magnifications of course add details, but lead to a strong drop in the brightness of the image, making it difficult to observe.
The best month for observing M43 is January.

Nikolay Kurdyapin,  
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