Celestial hemisphere:  Southern  ·  Constellation: Carina (Car)  ·  Contains:  Carina Nebula  ·  Foramen  ·  IC 2599  ·  NGC 3324  ·  NGC 3372  ·  NGC 3496  ·  NGC 3503  ·  PK288+00.1  ·  PK288+00.2  ·  PK288-00.1  ·  Part of the constellation Carina (Car)  ·  T Car  ·  TYC8613-2110-1  ·  TYC8613-3362-1  ·  TYC8613-491-1  ·  TYC8626-1734-1  ·  TYC8626-2024-1  ·  TYC8626-2052-1  ·  TYC8626-2334-1  ·  TYC8626-2523-1  ·  TYC8626-2602-1  ·  TYC8626-2804-1  ·  TYC8627-1984-1  ·  TYC8627-435-1  ·  TYC8957-1556-1  ·  TYC8957-1605-1  ·  TYC8957-2919-1  ·  TYC8958-2762-1  ·  The star t1 Car  ·  The star u Car  ·  And 7 more.
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Eta Carina W Nebula in SHO, George  Yendrey
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Eta Carina W Nebula in SHO

Getting plate-solving status, please wait...
Eta Carina W Nebula in SHO, George  Yendrey
Powered byPixInsight

Eta Carina W Nebula in SHO

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Description

This is a wide field image of the Eta Carina Nebula region, a very large active region in the sky of the southern hemisphere.  This is from a new Telescope Live dataset, after their AUS-2 telescope has been upgraded with a QHY 600M full frame CMOS camera (previously there was a CCD imager mounted on this telescope, a Takahashi FSQ106).

The pixel size is much smaller with the QHY CMOS camera, and it is a slightly different frame shape/format with much higher resolution per arc-sec than the previous CCD imager.  I thought it would be interesting to compare the two since the only difference between them is the imager (CMOS vs CCD).  The file sizes of the raw frames/master files are significantly larger than the CCD files, the full resolution XISF file of the final versions are approximately 700 mb for the full frame version, 500mb for the cropped version.  I am designating the cropped version as the final version due to the cropping off of most of the aberration area of the image.  

I did provide the cropped version to remove some abberation that is evident in the right/lower right of the image (the worst area).  I also rotated the final cropped version to match the orientation of the original CCD version.   TL is still working through the issues, and the cause of the aberration seems most likely to the result of sensor titl since there are no odd shaped stars/aberration evident in the earlier CCD version.  I believe the CMOS version captures more fine structure/detail in the image than the CCD version and I had the impression during post processing that there was more color depth.  IMO.  YMMV.

Look them over and make your own comparison to the earlier CCD version and let me know what you think of the current version and versus the CCD version found here.

Update:
This final version is the full frame from the telescope.  I decided to try a different stretching tool/technique.  The reason for doing this is that I felt like the dynamic range between the outer molecular clouds and the inner triangle was causing me to 'burn out' some of the detail/color range in that central triangle.  The GHS (GeneralizedHyberbolicStretch) tool gives the user some greater flexibility in what/where stretch is applied.  It is not intuitive in some aspects and I've barely touched on its capabilities.  Adam Block has some recent tutorials and YouTube videos that delve into this tool.  I'm not sure that I would recommend it for all targets, but where there is a lot of dynamic range to deal with it can give some additional capabilities to achieve an optimal solution.  M101 and M42 (Andromeda Galaxy and The Orion Nebula respectively) are two targets that come to mind that could benefit from GHS. vs the 'normal' stretching tools.

I think GHS helped me get closer to my vision for this object by allowing me to retain and actually provide strong detail in the outer molecular clouds while also taming the central core without resorting to differential mask/stretch or other techniques.  The outer regions become a stronger presence, so I chose not to crop them out and reverted back to the original full frame image.

Let me know what you think.

Please Enjoy!!!


Carina Nebula - WikipediaThe Carina Nebula or Eta Carinae Nebula (catalogued as NGC 3372; also known as the Great Carina Nebula) is a large, complex area of bright and dark nebulosity in the constellation Carina, located in the Carina–Sagittarius Arm of the Milky Way galaxy. The nebula is approximately 8,500 light-years (2,600 pc) from Earth.The nebula has within its boundaries the large Carina OB1association and several related open clusters, including numerous O-type stars and several Wolf–Rayet stars. Carina OB1 encompasses the star clustersTrumpler 14 and Trumpler 16

Trumpler 14 is one of the youngest known star clusters at half a million years old. Trumpler 16 is the home of WR 25, currently the most luminous star known in our Milky Waygalaxy, together with the less luminous but more massive and famous Eta Carinae star system and the O2 supergiant HD 93129A. Trumpler 15, Collinder 228, Collinder 232, NGC 3324, and NGC 3293 are also considered members of the association. NGC 3293 is the oldest and furthest from Trumpler 14, indicating sequential and ongoing star formation.The nebula is one of the largest diffuse nebulae in our skies.

Although it is four times as large as and even brighter than the famous Orion Nebula, the Carina Nebula is much less well known due to its location in the southern sky. It was discovered by Nicolas-Louis de Lacaille in 1752 from the Cape of Good Hope.The Carina Nebula was selected as one of five cosmic objects observed by the James Webb Space Telescope, as part of the release of its first official science images. A detailed image was made of an early star-forming region of NGC 3324 known as the Cosmic Cliffs.

Comments

Revisions

  • Eta Carina W Nebula in SHO, George  Yendrey
    Original
  • Eta Carina W Nebula in SHO, George  Yendrey
    B
  • Eta Carina W Nebula in SHO, George  Yendrey
    C
  • Eta Carina W Nebula in SHO, George  Yendrey
    D
  • Final
    Eta Carina W Nebula in SHO, George  Yendrey
    E

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Eta Carina W Nebula in SHO, George  Yendrey