Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Great Orion Nebula  ·  M 42  ·  M 43  ·  Mairan's Nebula  ·  NGC 1976  ·  NGC 1982  ·  Orion Nebula  ·  The star θ1Ori  ·  The star θ2Ori
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M42, The Great Orion Nebula (SH RGB), 



    
        

            Ruben Barbosa
M42, The Great Orion Nebula (SH RGB)
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M42, The Great Orion Nebula (SH RGB)

Getting plate-solving status, please wait...
M42, The Great Orion Nebula (SH RGB), 



    
        

            Ruben Barbosa
M42, The Great Orion Nebula (SH RGB)
Powered byPixInsight

M42, The Great Orion Nebula (SH RGB)

Equipment

Software
Maxim DL, Gimp

Acquisition details

Frames:
H-Alpha: 1x3600" (1h)
RGB: 40x360" (4h) ISO800
SII: 1x3600" (1h)
Integration:
6h

Basic astrometry details

Astrometry.net job: 5117799

RA center: 05h34m44s.6

DEC center: -05°2945

Pixel scale: 1.581 arcsec/pixel

Orientation: 10.292 degrees

Field radius: 0.570 degrees

Resolution: 1903x1766

Data source: Public amateur data

Description

* Image acquisition (RGB) by: JanD.

Imaging camera: Canon 600Da

Guiding camera: ZWO ASI120MC

Frames: 3x40x360"

* Image acquisition (SH) by: David Nguyen.

Imaging telescope: Astro-Physics 152mm f/7.5 Starfire EDF

Imaging camera: FLI ProLine Proline 16803

Mount: Software Bisque Paramount MX

Frames: 2x3600"

* Processing: Ruben Barbosa.

The Nebula in Orion is much appreciated by astronomers. It can be seen without help of equipment like a small diffuse spot in the direction of the Orion constellation. It lies between 1500 and 1800 light-years of the Solar System and is an example of star formation, where interstellar dust forms stars as they associate due to gravitational pull.

Stars form when hydrogen and other elements accumulate in HII regions of space, by contraction due to their own gravity. As the gas collapses, the central cluster attracts more and more particles, transforming the gravitational potential energy into thermal energy. With the increase in temperature, the nuclear fusion process begins, giving rise to a protostar. In the HII regions, the ultraviolet light from hot stars O and B ionize the hydrogen gas around them. When the electrons recombine, they emit mainly in the visible and specifically in the wavelength 6563Å, red color.

Astronomical masers are often found in this type of region and consist of interstellar gas consisting of atoms, molecules, and ions of chemical elements, or gaseous substances present in the interstellar medium, which amplify electromagnetic radiation thousands of times.

At low frequencies (up to 1 GHz), this region is opaque and emits a black body spectrum (the flow increases with frequency) to the upper limit of 10^3 Jy. The emission mechanism is Bremsstralung.

At higher frequencies (wavelengths shorter than about 30 cm), the plasma becomes transparent and the dominant emission mechanisms are the synchrotron and MASER.

Comments

Revisions

  • M42, The Great Orion Nebula (SH RGB), 



    
        

            Ruben Barbosa
    Original
  • Final
    M42, The Great Orion Nebula (SH RGB), 



    
        

            Ruben Barbosa
    C

C

Description: Sharper version

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Sky plot

Sky plot

Histogram

M42, The Great Orion Nebula (SH RGB), 



    
        

            Ruben Barbosa