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M81 5½ hours

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#1 jakob1234

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Posted 19 March 2017 - 10:30 AM

Hi everyone!

 

I reached 5½ hours of subs, and decided this was "good enough". Processed in DSS, PS, Fitswork and Pixinsight light.

 

It's a crop of the image, since i wanted to concentrate on m81, and i find m82 unappealing.

 

There seems to be a lot of dust in this region, and i tried to preserve this in the image.

 

C&C very welcome!

 

da5063947161461c6e23d8c9276e2ec0.1824x0_


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#2 petert913

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Posted 19 March 2017 - 11:03 AM

That..... is gorgeous !


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#3 cinbody

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Posted 19 March 2017 - 11:31 AM

I have seen hints of the dust in my own image (much dimmer due to shorter integration however). Also, hints of the "blue" object just north of M81 in your image but have not had time to research it yet. Any idea what it is?


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#4 agavephoto

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Posted 19 March 2017 - 11:36 AM

I have seen hints of the dust in my own image (much dimmer due to shorter integration however). Also, hints of the "blue" object just north of M81 in your image but have not had time to research it yet. Any idea what it is?

That little blue object is called Holmberg IX. It is a small satellite galaxy near M81.


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#5 jakob1234

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Posted 19 March 2017 - 01:29 PM

Thanks guys!

 

I would like to have the core a little less burnt out though - but somehow i didn't take the short subs for it...



#6 jimegger

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Posted 19 March 2017 - 07:57 PM

Very Well Done !!!!


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#7 Bloated Star

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Posted 19 March 2017 - 09:00 PM

Beautiful image!
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#8 ismosi

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Posted 19 March 2017 - 11:16 PM

Well done! I think I see some IFN there as well.

 

Try HDRMultiScaleTransform in PixInsight. That might recover the 'blown out' core ...


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#9 jakob1234

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Posted 20 March 2017 - 03:51 AM

IFN?

 

What is that?



#10 TeamHawkins

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Posted 20 March 2017 - 10:22 AM

This is an excellent job.


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#11 Maxtrixbass

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Posted 20 March 2017 - 10:28 AM

Really really nice!


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#12 jakob1234

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Posted 20 March 2017 - 01:45 PM

Thanks alot guys! I'm going to continue my galaxy project - next time it'll be m51 with my 2,7x barlow - then it nearly fills the frame grin.gif

 

I took an image of it with that setup last year, but didn't get enough subs, hence it was very noisy - but i'm hoping to get some clear nights before the season stops, and maybe get 6/8 hours of subs.



#13 DaveB

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Posted 20 March 2017 - 02:13 PM

IFN?

 

What is that?

That stands for Integrated Flux Nebula, which is the "stuff" between galaxies. Here is a NASA APOD image of M81 that highlights the IFN: https://apod.nasa.go...d/ap120313.html


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#14 jakob1234

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Posted 20 March 2017 - 02:30 PM

 

IFN?

 

What is that?

That stands for Integrated Flux Nebula, which is the "stuff" between galaxies. Here is a NASA APOD image of M81 that highlights the IFN: https://apod.nasa.go...d/ap120313.html

 

Cool - thanks! i was pretty shure that it was dust and so on, so i tried my best to preserve it smile.gif



#15 aacc66

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Posted 20 March 2017 - 11:36 PM

Great image. waytogo.gif

 

Which OTA did you use?  Did you used a Barlow in this one too?

 

Alvaro


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#16 jakob1234

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Posted 21 March 2017 - 06:13 AM

I used my skywatcher 200pds - no barlow.

 

Combined with a 0,9 coma corrector and my nikon d5300. The frame is cropped a little bit, but not much. I wanted to get rid of m82 and focus m81 in the center, hence the crop.



#17 aacc66

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Posted 21 March 2017 - 07:55 PM

Thanks.  I do find strange that you find M82 unappealing given that it has all those tendrils of gas and dust escaping from it.

 

https://en.wikipedia...a-large_web.jpg

 

Some people in this forum had been able to capture them; no me for sure.frown.gif

 

Anyway good job.

 

Alvaro



#18 jakob1234

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Posted 22 March 2017 - 02:28 PM

Its not that i dont like it per say, its just i wanted to focus only on m81 and have it in the center of the frame. that makes m82 stand out in the very edge of the frame, and that i didn't like. i did capture those tendrils btw, but i think i'll do a barlow capture on m82 another time :-)

#19 orionic

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Posted 22 March 2017 - 08:19 PM

Spectacular... I hope I see this in my dreams!

 

I agree it's hard to top this image, although for visual observation in an 8" scope, I prefer M82 since it looks more distinct from your average galaxy.


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#20 aacc66

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Posted 22 March 2017 - 09:19 PM

Its not that i dont like it per say, its just i wanted to focus only on m81 and have it in the center of the frame. that makes m82 stand out in the very edge of the frame, and that i didn't like. i did capture those tendrils btw, but i think i'll do a barlow capture on m82 another time :-)

That makes more sense, it is a framing thing. :-)

 

Alvaro


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#21 hherzy

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Posted 22 March 2017 - 10:08 PM

You said that you were unhappy with the core, but I think it is great. I think that sometimes when you work too much to reduce the dynamic range it makes the image seem too flat and a little strange looking. For example, lots of M42 pictures with steps taken to preserve the core come out looking strange. Point is, sometimes it hurts more than it helps to attempt to preserve the core.


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#22 HockeyGuy

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Posted 22 March 2017 - 10:35 PM

This is excellent for a DSLR, you've picked up a lot of faint detail. I am curious to see how your M82 turned out, would you mind posting it? I'm considering shooting M82 in H-alpha to capture the starburst lobes, though I don't know if it is worth the while with a D5300 and an 8" Schmidt.


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#23 jakob1234

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Posted 23 March 2017 - 01:52 PM

Thanks alot guys!

 

Yes, the more i look at the core - the more i tell myself it's good.

 

I'll post the m82 when i get a look at it - i cropped straight away, so i never processed it. It is for sure a target in the future, but not this season smile.gif



#24 jakob1234

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Posted Yesterday, 02:48 PM

Update:

 

I boosted the star color, and removed a small dark "splotch" that resides somewhere in my optical train - but i haven't found it yet...

 

2180104cc4d0b71fb2d5625ae160529c.1824x0_




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