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Herbig-Haro objects in the Pelican Nebula

astrophotography Meade
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#1 meegja

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Posted 08 August 2020 - 12:05 PM

Active region in the Pelican Nebula (IC 5070) in H-alpha, H-beta, O-III, N-II, and S-II with multiband filters.
The Netherlands in Bortle 7/8
My first *real* DSO capture. Before this, captures of maybe 1 hour. This one is 5:20 hours in total.
And still on f/10 without guiding wink.gif

 

This is a part of the Pelican Nebula with star formation. It includes several Herbig-Haro (HH) objects of which HH 555 is the most prominent one.
An HH-object is a jet of particles and gas ejecting from forming stars. This with several hundreds of kilometres per hour.
In the top of the large, vertical dust pillar is an invisible forming star. But the jets are visible, in this case the small horizontal line.
Other HH-objects are there but not with such prominent outbursts.

 

Meade LX65 8" f/10 ACF OTA
Ioptron CEM25EC mount (no guiding)
Optolong L-Pro multiband filter
Optolong L-eNhance multiband filter
Zwo ASI294MC Pro camera

 

Captured with SharpCap Pro @ -10 graden Celsius / Offset 30 / White balance R50/B50
160 x 60 sec / Optolong L-Pro (over several night in between bands of clouds)
80 x 120 sec / Optolong L-eNhance

 

Stacked in DeepSkyStacker with 100 darks (experiment) + 100 flats + 100 dark flats for every set.
Stacked the L-Pro set, saved as FITS
Stacked the L-eNhance set, saved as FITS
Stacked the 2 saved FITS, saved as TIF

 

Processed in PS: Levels, Curves, Shadows/Highlights, color strengthening. Astronomy Tools actions: Contrast enhancement, noise reduction.
Copy/paste and black/white conversion including altering the color channels to grey.
Made composition, bit more noise reduction.

 

Full version can be found here: https://i.imgur.com/Jynq5CW.jpg

 

Jynq5CW.jpg


Edited by meegja, 08 August 2020 - 12:40 PM.

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#2 MikeTahtib

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Posted 08 August 2020 - 12:28 PM

Truly awesome photograph!  And I learned something new, so thank you.  I don't see anything labelled HH550.  The most prominent one looks like HH555. Is there  a typo, or is there something I'm not seeing?


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#3 meegja

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Posted 08 August 2020 - 12:41 PM

Truly awesome photograph!  And I learned something new, so thank you.  I don't see anything labelled HH550.  The most prominent one looks like HH555. Is there  a typo, or is there something I'm not seeing?

Thank you!

And no, it was indeed a typo, I corrected it. Thanks.



#4 lee14

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Posted 08 August 2020 - 12:53 PM

Outstanding image. Thanks for sharing!

 

Lee


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#5 meegja

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Posted 09 August 2020 - 03:13 AM

Outstanding image. Thanks for sharing!

 

Lee

Thanks!! smile.gif



#6 lambermo

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Posted 09 August 2020 - 08:23 AM

Nice result ! That unguided advertised "PE Less Than 0.3 arcsec rms" works :)

 

I find the Ha data a bit too smoothed. But that's my taste.

 

I pulled it through a local astrometry.net installation for you, your image FOV is 34x21 arcminutes at 0.74 arcsec/pixel :
 

 

RA,Dec = (312.779,44.4197), pixel scale 0.737773 arcsec/pix.

solved with index index-4205-03.fits

Field center: (RA,Dec) = (312.778817, 44.419761) deg.
Field center: (RA H:M:S, Dec D:M:S) = (20:51:06.916, +44:25:11.138).
Field size: 34.0846 x 21.4813 arcminutes
Field rotation angle: up is -89.8307 degrees E of N
Field parity: neg

Your setup LX200-8f10 ASI294 normally gives 0.47"/p. How did you scale ?


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#7 meegja

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Posted 09 August 2020 - 10:35 AM

Nice result ! That unguided advertised "PE Less Than 0.3 arcsec rms" works smile.gif

I find the Ha data a bit too smoothed. But that's my taste.

I pulled it through a local astrometry.net installation for you, your image FOV is 34x21 arcminutes at 0.74 arcsec/pixel :

Your setup LX200-8f10 ASI294 normally gives 0.47"/p. How did you scale ?

Thanks!

 

Ha, I only wish I had a LX200 grin.gif  No, I have the very little brother of that, the LX65.

Theoretical it is indeed 0.47"/p. But I used an original FITS (so the real size) on that site now and it gives 0,525"/p. This means an actual f/9. I think the combination of scope and camera is the cause there plus the placement of the camera. Although there is only  adapter in between the camera and scope.

 

And yes, with a bit of manual tweaking of the sidereal tracking + very good polar alignment polar alignment, the mount does wonders.
 



#8 Starman27

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Posted 09 August 2020 - 11:26 AM

Truly wonder filled image. Thanks for all of the notational data.



#9 MHamburg

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Posted 09 August 2020 - 11:37 AM

Incredible image! There is also something very revealing in the grey-toned image. The folks at the Space Science Institute should be jealous.

Michael



#10 meegja

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Posted 09 August 2020 - 08:14 PM

Truly wonder filled image. Thanks for all of the notational data.

Thanks and your welcome smile.gif

 

Incredible image! There is also something very revealing in the grey-toned image. The folks at the Space Science Institute should be jealous.

Michael

Ha, that's too much credit ... but thanks wink.gif

And yes, the grey tone is more easier on the eyes I find. Going to re-do it all with all the data and then focus on grey tones, see what happens :)



#11 Lucky 777

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Posted 02 September 2020 - 08:20 AM

I'm hoping to do some DSO imaging and a C8 is what I have to work with.  Thank you for the reassurance it can be done!


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#12 meegja

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Posted 02 September 2020 - 10:29 AM

I'm hoping to do some DSO imaging and a C8 is what I have to work with.  Thank you for the reassurance it can be done!

It can be done yes. But it takes some more efforts and experimenting then with a refractor, but that's the fun part for me. Plus good guiding (or in my case excellent tracking).




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