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LDN 137 and LDN 141 and Dusty Surrounds

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#1 Jim Thommes

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Posted 13 August 2019 - 08:42 PM

Here is an image of LDN 137 and LDN 141 and surrounding region. The background star field is fairly dense, so the dark nebulae stand out pretty well. LDN 141 is smaller and denser than LDN 137 and is either embedded in or foreground to the larger dark nebula. Also in this field are some background galaxies. Some of those have similar distance measurements and are members of the the same galaxy group [CHM2007] 1223.

 

Image and details can be accessed from the link below. For convenience, I have provided a link to the annotated image below, but it can also be accessed from the main image page.

 

 

LDN137_FSQ_PI2_PS3_small.jpg

 

LDN 137 and LDN 141

 

 

Annotated Image:
http://www.jthommes....3_annotated.jpg

 

Scope: FSQ-106N at f/5
Camera: Atik 383L (Astronomik Gen 2  LRGB Filters)


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#2 Hondo

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Posted 13 August 2019 - 09:25 PM

Beautiful image Jim.



#3 Gregory

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Posted 14 August 2019 - 12:26 AM

Strikingly authentic look and feel, so much how

I prefer DSO images to be.

 

Gregory

 



#4 james7ca

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Posted 14 August 2019 - 12:43 AM

Thanks for all of the detail. A nice treatment.

 

Did the star spikes come from the camera?



#5 Mert

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Posted 14 August 2019 - 03:09 PM

That is outstanding, that dark nebulosity seems to float

in front of the star field.

Beautiful!



#6 b_kassabov

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Posted 14 August 2019 - 03:39 PM

Very nice!



#7 lucam

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Posted 14 August 2019 - 03:48 PM

Beautiful image, JIm! Lovely area of the sky.

 

Thanks for all of the detail. A nice treatment.

 

Did the star spikes come from the camera?

Star spikes are par for the course with the Tak and KAF8300 sensor. I think it has to do with micropatterning on the sensor itself, but I am not completely sure.



#8 PeteM

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Posted 14 August 2019 - 05:13 PM

Great image and processing Jim.



#9 elmiko

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Posted 14 August 2019 - 06:31 PM

Outstanding image Jim! Processing is spectacular.

Mike



#10 Jim Thommes

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Posted 14 August 2019 - 10:10 PM

Thanks for all the comments folks.

 

 

Thanks for all of the detail. A nice treatment.

 

Did the star spikes come from the camera?

Beautiful image, JIm! Lovely area of the sky.

 

Star spikes are par for the course with the Tak and KAF8300 sensor. I think it has to do with micropatterning on the sensor itself, but I am not completely sure.

Luca, Thanks for the comment on the image. And to James7ca as well - The spikes are pretty small (compared to secondary spider spikes).  I also see them on a different scope and a different KAF8300 camera I use. There are 8 versions of the KAF8300 (in mono); 2 come without micro-lenses. I use the Atik 383L (like this image) and SBIG ST8300M. I don't know if the sensors in these cameras have micro-lenses or not. But their behaviors with regard to these small spikes are pretty much the same. I suspect they have micro-lenses.

 

That is outstanding, that dark nebulosity seems to float

in front of the star field.

Beautiful!

Thanks Mert. You know, I actually took more Luminance than I anticipated - I needed a second night and then had lots of time so I just kept taking exposures. You know what they say - more exposure time never hurts. I think I got a bit of a boost with the data with the extra exposures (more than my usual).

 


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