M 42

Great Orion Nebula

The Orion Nebula is an emission nebula in the constellation Orion. Due to its brightness, the nebula is easily visible to the naked eye south of the three stars of the Orion belt.


recording data

object Messier 42
date of recording
2 and 3 December 2016
exposure 16.4 h, RGB: 98x20", 73x5" 65x100", 267x80", H-alpha: 71x20", 26x500", 20x700", 51x10"
telescopes Celestron RASA F2.2, TS65Q
focal lenght 620mm, 420mm
filter Baader Ha 2" 7nm, IDAS LPS D1
cameras Canon EOS 5Da MKII, Canon EOS 5Da MKII mono
guiding 250mm guide scope, MGEN
mount Celestron CGE pro
AstroBin click here

In the sword of Orion

The Orion Nebula (also known as Messier 42, M42 or NGC 1976) is a diffuse nebula in the Milky Way located south of the Orion Belt in the constellation Orion. It is one of the brightest nebulae and visible to the naked eye. M42 is about 1,350 light years away from the Earth and is therefore one of the nearest HII star formation regions. The diameter of the Orion Nebula is estimated at 24 light years. Its mass is approximately 2,000 time the Sun.


The Orion Nebula is one of the most studied and photographed objects in the night sky and one of the most intensively studied celestial bodies. The nebula provided important insights into the process of the formation of stars and planetary systems from collapsing gas and dust clouds. Astronomers have also observed protoplanetary discs, brown dwarfs and turbulent movements of gas in the nebula.

Baerenstein Observatory

private observatory
Marcel Drechsler






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