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IC2574 "Coddington's Nebula"

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#1 Jim Thommes

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Posted 21 May 2019 - 07:56 PM

Here is an image of IC 2574, Coddington's Nebula". IC 2574 is a nearby dwarf galaxy and is classified SAB(s)m. It is a member of the M81 galaxy group and is at a distance of about 11 million light years. Also in this image is the Abell Galaxy Cluster ACO1005. Unfortunately the distance and dimness of the member galaxies means very few show up in this image. There are several more noticeable background galaxies in this field but are apparently lightly studied. None of these have distance estimates; some are only in UVSource or IRSource catalogs. These objects are identified in the annotated image.

 

Incidentally, I am now using PixInsight to do a partial annotation. I am still completing the annotation in Photoshop. I hope to be able to eventually do all of the annotations in PixInsight after I insert some custom catalogs. I would also need to figure out how to render ellipses in PixInsight as well. 

 

Image and details can be accessed from the link below. For convenience, I also provide a link below to the annotated image. But the annotated image can also be accessed from the main image page.

 

 

IC2574_Edge7_PII3-PS4-IP2-Crp_small.jpg

 

Coddington's Nebula - IC 2574

 

 

Annotated image:
http://www.jthommes....p-annotated.jpg

 

Scope: Celestron 9.25 Edge 235 mm at f/7
Camera: ST8300M (Baader LRGB filters)


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#2 Gregory

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Posted 21 May 2019 - 08:10 PM

Wonderful shot of a difficult object.

 

It’s on my list of “if the skies ever clear again, that one”.  ;-)

 

greg

 



#3 Astro-Master

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Posted 21 May 2019 - 08:58 PM

Beautiful image, I love the deep field!



#4 astrovienna

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Posted 21 May 2019 - 10:50 PM

Nicely done, Jim.  That's one of the best I've seen on this galaxy.  BTW, I don't think PI's Annotate script can be set to do anything but circles.  But then I've never tried.  If you've figured out how to upload custom catalogs, would you let us know the trick?  I wouldn't mind getting deeper catalogs into PI, but my sense was that catalogs require a lot of tedious manual work before they can be read by PI.  Thanks!

 

Kevin



#5 jhayes_tucson

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Posted 22 May 2019 - 12:14 AM

Very nicely done Jim!  That's a great looking image and an interesting galaxy.

 

John

 

 

PS  Adam Block found a site with a ellipse drawing tool for PI.  I'll have to look to see if I have it in my notes.



#6 Dan Crowson

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Posted 22 May 2019 - 09:33 AM

Jim,
 
excellent work. I really like the odd, irregular galaxies.
 
For the person that asked about adding catalogs, I know I found something really quick when I googled. It took no time to add a list of exoplanets when I wanted to annotate an image.
 
Lastly, I'd be interested in the ellipse drawing tool as well.
 
Dan


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#7 scopenitout

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Posted 22 May 2019 - 10:18 AM

Beautiful capture! And thanks as always for the annotated image. Lots of tiny objects in the frame.

#8 Jim Thommes

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Posted 23 May 2019 - 12:51 AM

Thanks for the comments folks! Some additional follow up below....

 

 

Nicely done, Jim.  That's one of the best I've seen on this galaxy.  BTW, I don't think PI's Annotate script can be set to do anything but circles.  But then I've never tried.  If you've figured out how to upload custom catalogs, would you let us know the trick?  I wouldn't mind getting deeper catalogs into PI, but my sense was that catalogs require a lot of tedious manual work before they can be read by PI.  Thanks!

 

Kevin

Kevin,

I had been in an email thread with Gilles Chapdelaine (Canadian imager). He offered me a gem from a post on another forum regarding custom catalogs:

https://stargazerslo...es-brief-guide/

 

 

Very nicely done Jim!  That's a great looking image and an interesting galaxy.

 

John

 

 

PS  Adam Block found a site with a ellipse drawing tool for PI.  I'll have to look to see if I have it in my notes.

John,

Yeah, If you find anything, let us know. Being able to annotate elipses would be neat (and really convenient if it can be done in a transparancy layer like the PI annotation capability)

 

Jim,
 
excellent work. I really like the odd, irregular galaxies.
 
For the person that asked about adding catalogs, I know I found something really quick when I googled. It took no time to add a list of exoplanets when I wanted to annotate an image.
 
Lastly, I'd be interested in the ellipse drawing tool as well.
 
Dan

Dan,

I am going to check out the GAME PI script more closely to see if something can be utilized for annotation elipses. GAME is mainly for drawing elliptical masks:

 

https://www.skypixel...ripts.html#game

 

I have not upgraded yet to the latest PI 1.8.6 release. I understand it is supposed to have some annotation improvements.

 



#9 gunny01

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Posted 23 May 2019 - 05:12 AM

  Great looking image Jim.  Adding it my "not often imaged" list.



#10 Michael Deger

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Posted 23 May 2019 - 05:19 AM

Hi Jim,

 

very good image with a lot of details.

 

 

All the best

Michael

 

http://galaxyphoto.de



#11 catalogman

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Posted 23 May 2019 - 03:07 PM

An easy way to annotate an image is to convert it to .fits, plate-solve it, then display it in a planetarium

program with a custom catalogue.

 

Attached is the result in CdC with this catalogue of HII regions:

 

http://adsabs.harvar...AJ....118..273W

 

--catalogman

Attached Thumbnails

  • I2574_CdC.JPG

Edited by catalogman, 23 May 2019 - 03:08 PM.


#12 Jim Thommes

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Posted 24 May 2019 - 05:00 PM

Thanks again for the comments folks.

 

An easy way to annotate an image is to convert it to .fits, plate-solve it, then display it in a planetarium

program with a custom catalogue.

 

Attached is the result in CdC with this catalogue of HII regions:

 

http://adsabs.harvar...AJ....118..273W

 

--catalogman

Thanks for this annotation information.




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