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... М41 < М42 > М43 ...

Emission nebula and open star cluster M42

Emission nebula and open star cluster M42 or Orion nebula is in the constellation Orion (Ori).

M42

Equatorial coordinates (epoch J2000):
Ra 05h 35.4m, Dec -05° 23'

Visual magnitude: 5,0m - this object can be seen with the naked eye on a black sky, in the absence of illumination from street lighting.
Distance to the nebula M42 to the Sun is 1300 light years
Angular size: 65'×60'
External dimensions the nebula M42 are about 15 light years.

Discoverer: Nicolas-Claude Fabri de Peiresc, 26.11.1610 year.

The designation M42 in other catalogs: NGC 1976

Optimum magnification for a telescope with observations of M42, 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 M42 is January.

 Русский en en en en en en en en en en en en
... М41 < М42 > М43 ...

The parameters of the open star cluster M42

or Orion star cluster

Equatorial coordinates (epoch J2000):
Ra 05h 35.4m, Dec -05° 23'


Distance to the star clusters M42 to the Sun is 1300 light years
Angular size: 3'
External dimensions the star clusters M42 are about 4 light years.
Number of stars: 300+
Age of the object M42 is 0,1x106 years


The best month for observing M42 is .



Nikolay Kurdyapin, astro-map.com  
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