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Galaxy NGC 4559 and Friends

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#1 Jim Thommes

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Posted 24 June 2019 - 06:10 PM

Here is an image of NGC 4559 and surrounding area. It is a barred galaxy with a weak inner ring and spiral features. NGC 4559 displays star forming regions. The classification is SAB(rs)cd. NGC 4559 is a member of the Coma I galaxy group and several larger groups [CHM2007] LDC 709 and LDC 867.

 

I am somewhat baffled by a group of objects in the southwest quad of the galaxy where different catalogs/surveys/observations report variously a HII item (NGC 4559C), a possible supernova candidate (PSN J12355230+2755559), a Luminous Blue Variable (AT2016blu), and a Galaxy Group (SDSSCGB 754 - w/5 members). I expected the galaxy group to be background since it is so small, but it has a distance estimate that puts it nearly adjacent to NGC 4559 itself. It seems odd to have such a group so close the the large gravitational pull of NGC 4559. This group of features is kind of a little speck to be studied so intensely.

 

Also in this image are galaxies IC 3598 and IC 3592. The latter is also known as NGC 4559A but is only associated visually since it is at an estimated distance of 334 million light years compared to NGC 4559's 36 million light years. Based on its estimated distance, NGC 4559 spans about 81,000 light years to 123,000 light years in diameter. It is interesting to see in this image the 'little' galaxy, ASK 577867.0, at 1.477 billion light years distant. By comparison, it spans about 263,000 light years - quite a monster. There are quite a few other background galaxies in this image - a few of which are shown in the annotated image.

 

Image and details can be accessed form the link below. I also provide below a link to the annotated image (for convenience) but it can also be accessed from the main image page.

 

 

NGC4559_Edge7_PI1_PS2_IP2_small.jpg

 

 

NGC 4559 in Coma Berenices

 

 

Annotated image:
http://www.jthommes....2_annotated.jpg

 

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

 


  • Gregory, schmeah, noodle and 16 others like this

#2 BBC

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Posted 24 June 2019 - 06:57 PM

Very nice image and description! I really like the full field image.


Sent from my iPhone using Tapatalk Pro

Edited by BBC, 24 June 2019 - 06:58 PM.


#3 elmiko

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Posted 24 June 2019 - 07:16 PM

Beautiful image  Jim. The processing is really nicely done. 

Mike 



#4 DaveB

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Posted 24 June 2019 - 07:34 PM

Awesome image, as always. Terrific colors and a nice, even background. I assume that you are loving your observatory?



#5 BenKolt

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Posted 25 June 2019 - 09:31 AM

Jim:

 

Great image! Interesting collection of objects!  Thanks for linking the annotated version.

 

Ben



#6 Jim Thommes

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Posted 25 June 2019 - 12:57 PM

Mike, Dave, Ben,

Thanks for the comments.

 

 

Awesome image, as always. Terrific colors and a nice, even background. I assume that you are loving your observatory?

Yeah, I am really loving the observatory. I used to set up at remote dark sites. The observatory has spoiled me - I'm not sure I want to go back to any of my old campsites. I still have to travel to the observatory, but when I get there things are mostly set up. Plus I have more work surfaces to work with and get more wind protection.



#7 Astrojedi

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Posted 25 June 2019 - 01:56 PM

Very nice image. I need to get a place in the desert. My backyard in San Diego has been covered with clouds / marine layer for what feels like months now.



#8 JoeR

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Posted 25 June 2019 - 04:35 PM

Excellent work this one seems to get overlooked even though it's quite a photogenic DSO.



#9 Jim Thommes

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Posted 27 June 2019 - 06:46 PM

Astrojedi, JoeR,

Thanks for the comments



#10 schmeah

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Posted 27 June 2019 - 09:44 PM

Another beauty Jim!



#11 PeteM

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Posted 27 June 2019 - 11:04 PM

Great work on this and love the detailed description. So you have a remote observatory that you travel to and not one of the "remote villages"? I ask because I am considering something similar(travel to).



#12 Strongmanmike

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Posted 28 June 2019 - 02:32 PM

Cool shot Jim, yes I noticed ASK 577867.0 ...quite a distance away that!

 

Mike



#13 Jim Thommes

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Posted 29 June 2019 - 07:22 PM

Great work on this and love the detailed description. So you have a remote observatory that you travel to and not one of the "remote villages"? I ask because I am considering something similar(travel to).

Pete,

Thanks for the comment. Yeah, I have an acre of land out in the boondocks. My two partners and I have had BYO build some observatories for us. Yes, I travel there to do my exposures. I enjoy getting out and having hands on the equipment (two piers and two imaging setups) and I generally enjoy looking at dark sky and beautiful landscape in the desert. I also enjoy some of the observatory amenities (electrical was brought to the property, plus  easier setups and less stuff to haul around). Right now I am improving my automation - I think I can get to full capture automation less calibration exposures pretty soon now. I may at some point set up remote control at the observatory, but I think that is a ways off yet.

 

Cool shot Jim, yes I noticed ASK 577867.0 ...quite a distance away that!

 

Mike

Mike,

Thanks for the comment. Yeah, ASK 577867.0 caught my attention when I was doing post process research and annotation. I was surprised to see such a large distance estimate (by redshift) and yet see something on my image other than just a dot.



#14 Jim Thommes

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Posted 29 June 2019 - 07:35 PM

Another beauty Jim!

Thanks for the comment Derek.




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