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What are these blue jets?

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#1 Eyeroll1952

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Posted 15 April 2024 - 08:14 PM

Captured an image of NGC5905 and surrounding area over the past couple of nights and noted the blue jets emanating from HD135501. These don't appear to be an imaging artifact but the relatively few images I have seen online don't show these features. Would appreciate help educating me on what these are. I have seen references to astrophysical jets and stellar jets so perhaps that is it. There is also a second weaker instantiation of this phenomenon of the extreme right side but with different jet angle and color. 

 

Thanks!

 

Paul

 

 

 

Attached Thumbnails

  • NGC5905 2024-04-14.jpg
  • Blue jets in NGC5905 2024-04-14.jpg


#2 Sheremy01

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Posted 15 April 2024 - 08:32 PM

I would say it’s diffraction spikes from wires in front of your scope. I use hyper star and get similar effects from the cords running from my camera.
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#3 Michael Covington

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Posted 15 April 2024 - 08:34 PM

I think it's an optical artifact.  I don't see the jets in any of several good images on Aladin.  Could there have been anything (even a single spiderweb) across the front of your objective?



#4 Eyeroll1952

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Posted 15 April 2024 - 08:51 PM

My first thought was also that this was some artifact, but if it were some wirelike diffractive item it shouldn't just show up on one image object... I am more inclined to think this is a Nobel Prize worthy discoverysmile.gif



#5 BKMaynard

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Posted 16 April 2024 - 08:35 AM

Looks like a partial obstruction of your scope. I see this when the shutter opening in my dome isn’t directly in front of the scope. It shows prominently on bright stars.

#6 Eyeroll1952

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Posted 16 April 2024 - 09:45 AM

Dang, no Nobel Prize this year either. What threw me off was the "jets" only showing up on one star. Then I went back and looked at individual subs and can see faint traces on many of the brighter stars on some subs. I suspect that too heavy processing, perhaps going crazy with Croman tools, wiped out all the traces except on the brightest star. I am inclined to think that BKMaynard's hunch is correct  that it might be diffraction off a dome aperture edge. Need to check alignment as this has never happened to date. 

 

Sorry if I wasted people's time instead of doing more homework before posting. I least I got a pretty picture out of it...

 

Paul



#7 DaveDE

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Posted 16 April 2024 - 12:16 PM

I can see it now - Next up from Croman tools: DiffractionSpikeXterminator !




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