Abell 85

[Kinch]

 
CTB is a supernova remnant (leftovers from an exploding star), similar to the famous Veil Nebula in Cygnus but much fainter. Its size in the sky is similar to the size of a full moon and it is approximately circular. Note, however, that its outer shell has ruptured between the 7 and 8 o'clock position. Originally this was thought to be a planetary nebula (which is why it appears as Abell 85 in his catalogue of planetaries) but in 1971 it was determined that it is actually a supernova remnant.

Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera:  QHY 5 II
Focal Extender / Reducer:  None
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters:  Astrodon Ha (3nm), OIII (3nm) and  Astrodon R,G,B.

Accessories: Robofocus Focuser controlled by Lunatico Armadillo,  ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur. 

Dates:   14th - 17th Aug. 2024   

Frames: (Total)

Astrodon  Ha        60 x 600" 
Astrodon  OIII       60 x 600" 
Astrodon RGB      3 x 60 x 60"

Total integration  = 23 Hours

[tomato]

Very nice, great detail in the filaments.👍🏼

[Kinch]

45 minutes ago, tomato said:

Very nice, great detail in the filaments.👍🏼

Thank you - 👍

 

[Paul_T]

That's very nice.

I'm just finishing off my own rendition. I don't have the same level of detail you do, but that might be because I'm using a Esprit 80 and a KAF 8300.  less resolving power and lower sampling. However, your better details are well within the image scale of my system.

Maybe I need to be more aggressive in culling bad subs. Or something. lol. Here's my effort so far:

Edited October 19, 2024 by Pompey Monkey
image

[Kinch]

I found it quite a difficult object to bring out. This is my second attempt imaging this SNR - my first was not as good as yours. You don´t say what exposure time you have - it really needs more than I managed here.  For processing the data I used both APP (preprocessing) and PixInsight. 

[Paul_T]

80x15 minutes Ha and 72x15 minutes OIII, for a total integration time of 38 hours from E-Eye in Extremadura.

I've just posted the image and a fuller description of my processing here: https://stargazerslounge.com/topic/426770-hoo-ctb-1-in-cassiopeia/

 

[Bluemoonjim]

Beautiful image Kinch. So much fine detail. That's the quality I aspire to

[Kinch]

Thanks very much for that. It is not an easy target and happy to have improved on what I had done previously......but overall, not one of my better images (in my opinion).

[Sunshine]

Amazing image!

[ollypenrice]

A splendid image, as usual.

Olly

[Rodd]

It’s almost as if the Ha is interfering with the target, like it’s a blue (OIII) object smothered in a red blanket.  It looks very well done. I was considering going for this one tonight, but it would really be squeezed into my FOV.  I could use the reducer, but then I don’t get the benefits of the new .99x flattener. Oh well, I need a 2600 camera. 

[Kinch]

6 hours ago, Sunshine said:

Amazing image!

Thanks very much. Deep sky has always been my favourite - but just now getting started with Solar imaging.......I must go post one from yesterday.

[Kinch]

2 hours ago, ollypenrice said:

A splendid image, as usual.

Olly

Thank you Olly. (I am amazed at the comments lately....much appreciated).

[Kinch]

1 hour ago, Rodd said:

It looks very well done

Thanks Rodd. I have been living under the radar lately and not been interacting anywhere. Closed my FB page and started afresh - both on FB and AstroBin. Have not looked in on Telescopius since August maybe. This weekend (just gone) - started to get to grips with Solar imaging.....this too will be an interesting project for me. Still love Deep Sky but with the weather we are all getting....it may well be next month before I finish the one I am after.