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Dark Shark Nebula (LBN 535 and LDN 1235)

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(@greg-erianne)
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Joined: 3 years ago
Posts: 390
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What would summer be without a shark or two?! 🤣 

The Shark (Dark Shark) Nebula is about 650 light years (ly) away in the constellation Cepheus and is largely composed of interstellar dust, some of which is so dense it hides the stars behind it.

The Shark Nebula consists of a bright nebula (LBN 535; the body of the shark), a dark nebula (LDN 1235; the snout/eye of the shark), and two blue reflection nebulae, vdB 149/LBN 541 (bottom of shark) and vdB 150/LBN 546 (top of shark). 

Just behind the shark's dorsal fin, there's a small galaxy, UGC 11861 (an Active Galaxy Nucleus candidate: Simbad).

Capture Date: 7/7/2024

Askar 107PHQ with 0.7x reducer (fL = 524mm)
ASI2600MM Pro (Monochrome camera)
ZWO 7-position 2" Electronic Filter Wheel (EFW)
ZWO AM5 mount with guiding via SV106 and ASI178MM

Filters: Antlia L (0:72), R (0:33), G (0:21), and B (0:36) V Pro series filters. Total Integration: 2:42 

Pre- and post-processed in PixInsight.

Photoshop was used to remove extensive satellite trails in the RGB composite image and for generation of reduced size jpeg.

 

This topic was modified 5 months ago 2 times by Greg Erianne

   
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Terri Zittritsch
(@terri)
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Joined: 5 years ago
Posts: 407
 

Posted by: @greg-erianne

What would summer be without a shark or two?! 🤣 

The Shark (Dark Shark) Nebula is about 650 light years (ly) away in the constellation Cepheus and is largely composed of interstellar dust, some of which is so dense it hides the stars behind it.

The Shark Nebula consists of a bright nebula (LBN 535; the body of the shark), a dark nebula (LDN 1235; the snout/eye of the shark), and two blue reflection nebulae, vdB 149/LBN 541 (bottom of shark) and vdB 150/LBN 546 (top of shark). 

Just behind the shark's dorsal fin, there's a small galaxy, UGC 11861 (an Active Galaxy Nucleus candidate: Simbad).

Capture Date: 7/7/2024

Askar 107PHQ with 0.7x reducer (fL = 524mm)
ASI2600MM Pro (Monochrome camera)
ZWO 7-position 2" Electronic Filter Wheel (EFW)
ZWO AM5 mount with guiding via SV106 and ASI178MM

Filters: Antlia L (0:72), R (0:33), G (0:21), and B (0:36) V Pro series filters. Total Integration: 2:42 

Pre- and post-processed in PixInsight.

Photoshop was used to remove extensive satellite trails in the RGB composite image and for generation of reduced size jpeg.

 

Great image Greg, you are really cranking out the images.  I can’t even keep up on looking at them!   Super detail and resolution.

 

Terri

 


   
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(@greg-erianne)
Honorable Member
Joined: 3 years ago
Posts: 390
Topic starter  

@terri Thanks so much, Terri!  The raw data on this one started weird with more satellite trails than I've ever seem after WBPP in PI.  Turned out pretty well, though, after removing them.

Greg


   
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