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Rosette Nebula - SHO - Widefield, Olly Barrett
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Rosette Nebula - SHO - Widefield

Revision title: Poster Version

Rosette Nebula - SHO - Widefield, Olly Barrett
Powered byPixInsight

Rosette Nebula - SHO - Widefield

Revision title: Poster Version

Equipment

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Acquisition details

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Description

The Rosette Nebula is a vast emission nebula located about 5,200 light years away. The star forming region lies near a large molecular cloud in the constellation Monoceros, the Unicorn. It is closely associated with the young open star cluster NGC 2244. Also known as the Satellite Cluster, NGC 2244 appears in the centre of the Rosette. The hot young stars of the cluster were formed from the nebula’s material in the last 5 million years. The stars in the Satellite Cluster are responsible for the nebula’s glow. Their radiation ionizes the surrounding clouds of nebulosity, causing them to emit their own light. The nebula naturally glows in the red part of the spectrum because the powerful ultraviolet radiation from the stars strips electrons from the nebula’s hydrogen atoms.
The Rosette Nebula is a very active stellar nursery. It is home to numerous Herbig-Haro objects and Herbig Ae/Be stars, Bok globules, T Tauri stars and clusters of newly formed stars. The dark filaments of dust extending toward the centre of the nebula, sometimes called “elephant trunks,” are shaped by the stellar winds and radiation from hot young stars and electromagnetic forces.

The Image was made using combined SHO data from my Esprit 100ed at 550mm Focal Length and my Redcat 51 at 250mm
Quite a complex edit to put together...
Two separate images were completed, an Esprit SHO (also a standalone here) and a ground-up new pseudo SHO (PixelMath) Redcat image.
Stars were removed after star alignment and multiple curve, clarity, luminance adjustments made to allow colours to be matched during processing...
Both images were then blended using layers in Photoshop with multiple revisits to Pixinsight along the way...
Apart from colour matching, controlling the background and noise was the next biggest challenge...
Selective and graduated noise reduction was done at the end before adding back the stars...

The resultant image has the depth and clarity of a medium focal length within the main Nebula and the majesty of a full APS-C widefield gained by using a short focal length...

Clear Skies!
Olly

Revision B: Corrected some blending errors.
Revision C: Final colour correction.
Revision E: Revised Poster Version

Comments

Revisions

    Rosette Nebula - SHO - Widefield, Olly Barrett
    Original
    Rosette Nebula - SHO - Widefield, Olly Barrett
    B
    Rosette Nebula - SHO - Widefield, Olly Barrett
    C
  • Final
    Rosette Nebula - SHO - Widefield, Olly Barrett
    E

B

Description: Corrections to Blending

Uploaded: ...

C

Description: Final Colour Adjustments

Uploaded: ...

E

Title: Poster Version

Uploaded: ...

Sky plot

Sky plot

Histogram

Rosette Nebula - SHO - Widefield, Olly Barrett