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The Elephant's Trunk

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#1 Acer

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Posted 18 July 2019 - 12:44 PM

I shot the Elephant's Trunk Nebula last night.  This is my second time trying to shoot it, the first time was with a dslr and an 80mm scope.  I had a lot better luck this time with an ASI183MM Pro and MN190 scope.

 

Total integration time was 4 hours.  I really need to get an electric focuser so I can get my stars tighter.

 

20, 300 sec H-Alpha
15, 300 sec SII
13, 300 sec OIII

 

This was shot with the following:

 

Skywatcher MN190, 1000mm F5.2 Maksutov Newtonian
EQ8-R Pro
ZWO ASI183MM Pro
Skywatcher 72ED Guide Scope
ZWO ASI120 MC-S Guide Camera

Elephants-Trunk-Small.jpg


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#2 descott12

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Posted 18 July 2019 - 12:49 PM

Amazing!



#3 nyairman

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Posted 18 July 2019 - 01:38 PM

Excellent image!

#4 Acer

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Posted 18 July 2019 - 01:41 PM

Thanks guys. 

 

Here's a better image of it, on Astrobin.

 

get.jpg?insecure


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#5 durak

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Posted 18 July 2019 - 02:04 PM

Beautiful shot Acer. Impressive that you run such a heavy load on an eq6-r pro. Isn't the scope like 30 lbs.?



#6 Acer

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Posted 19 July 2019 - 09:20 AM

Beautiful shot Acer. Impressive that you run such a heavy load on an eq6-r pro. Isn't the scope like 30 lbs.?

Thanks!  Yeah, the scope and rings are around 30 lbs.  On top of that, I have a 72ED and camera for a guide scope and the imaging camera/filter wheel too.

I am probably pretty close to 40 lbs. with my setup, but I have absolutely no problems, and usually have guiding around .50 arc seconds total RMS during the full night.  I have yet to use PEC training, so I could probably get even better guiding once I started PEC training.



#7 OldManSky

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Posted 19 July 2019 - 10:03 AM

Really nice, Acer.  

What's the pixel scale with the 183 on that Mak-Newt?  You're getting really nice, fine detail...:)



#8 PeteM

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Posted 19 July 2019 - 08:41 PM

Great work on this! Processing is really done well.


Edited by PeteM, 19 July 2019 - 08:41 PM.


#9 Acer

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Posted 20 July 2019 - 10:36 AM

Really nice, Acer.  

What's the pixel scale with the 183 on that Mak-Newt?  You're getting really nice, fine detail...smile.gif

Thanks!  It is .50" per pixel, so pretty small.  I usually have good seeing here though, and my mount is guiding right around there as well.



#10 Acer

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Posted 20 July 2019 - 10:37 AM

Great work on this! Processing is really done well.

Thank you.  I am not real happy with the stars though.   The double star in particular, since it is easily seen as a double before I started editing.

 

I am going to have to work on that.



#11 fewayne

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Posted 21 July 2019 - 12:14 PM

Did you try explicit star reduction of any kind? I'm really liking the starnet++ neural-net script for completely removing stars so that nebulosity can be processed independently of the stars.

 

Really a beautiful image. I hope you're as proud of it, as I am envious!



#12 Oyaji

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Posted 09 September 2019 - 12:23 AM

That's really a beautiful shot. 

 

I have been out twice in the last two weeks trying to get pics of the Trunk, but thus far without success.  And now I gotta wait for a waning moon,

 

I feel like Cpt. Ahab pursuing Moby Dick.  Grrrr.....

 

Interesting that we both have the same 80mm refractor AND the same Mak-Newt (well, mine is a clone of yours).  


Edited by Oyaji, 09 September 2019 - 12:26 AM.



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