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NGC 2264 The Christmas Tree Nebula, George  Yendrey
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NGC 2264 The Christmas Tree Nebula

Getting plate-solving status, please wait...
NGC 2264 The Christmas Tree Nebula, George  Yendrey
Powered byPixInsight

NGC 2264 The Christmas Tree Nebula

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Description

This is a Telescope Live dataset, acquired by the SPA-1 OTA in Spain (a Takahashi 106FSQ) and its new QHY600M camera.

There is also a similar dataset for this OTA from a couple of years ago with the older CCD camera (smaller sensor, larger pixels), that has a much longer integration time - almost double.

I did process both, although I've decided to not post the CCD dataset, at least for now.  What I found is that the newer CMOS camera, with the larger sensor/smaller pixels captured a much higher level of detail even with the shorter exposure time.  The longer exposure time in the CCD dataset did provide a more 'dense' nebula cloud, but the lack of detail in the CCD vs the CMOS made the CMOS image set my preference.

I also worked through the new recommended workflow for the V2/Ai4 Blur Exterminator tool from RC Astro.  The improved tool does provide better noticeably. better star shapes when aberrations are present, but as Russ Croman noted, the most obvious effects are in poorer datasets.  Good quality image sets will not appear to change as much, which is the way it should be.  The new workflow for monochrome imaging is to apply BXT with "Correct Only" to the RGB/SHO/etc master frames BEFORE combining the channels and applying color correction, specifically SPCC since it uses the astronomic solution to tune its color correction algorithm.  The reason for doing this is the Correctly only option fixes most of the star aberrations which helps SPCC to plates solve faster/more accurately.  Once color correction has been applied, BXT is applied again with the Correct Only unchecked.

Also improved is the auto PSF function of the AI.  In the AI2, better results were found when the user manually determined the PSF of the image to be corrected.  In the new AI4, the AutoPSF functions as originally intended and provides the best results.  Adam Block has posted a YouTube video of an interview with Russ Croman with many of the improvements demonstrated on Adam's datasets.

The image posted is about 30% of the original full frame image.

NGC 2264 
NGC 2264 is the designation number of the New General Catalogue that identifies two astronomical objects as a single object: the Cone Nebula, and the Christmas Tree Cluster. Two other objects are within this designation but not officially included, the Snowflake Cluster, and the Fox Fur Nebula.  All of the objects are located in the Monoceros constellation and are located about 720 parsecs or 2,300 light-years from Earth.   Due to its relative proximity and large size, it is extremely well studied.  NGC 2264 is sometimes referred to as the Christmas Tree Cluster and the Cone Nebula. However, the designation of NGC 2264 in the New General Catalogue refers to both objects and not the cluster alone.  In December 2023, NASA released Christmas holiday-related images by the James Webb Space Telescope, including the Christmas Tree Galaxy Cluster and others.

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NGC 2264 The Christmas Tree Nebula, George  Yendrey