CTB1/ LBN 576 (Abell 85)

[Rattler]

This is supernova remnant CTB1/LBN 576 (Abell 85) in HOO+RGB. Known by some as the Popped Balloon or Garlic Nebula

This has been a real challenge but I'm passed the stage of several targets a night and want to get the time in.
I had never heard of this object until I was looking around Stellarium for more obscure targets. It's listed as a custom object.
I spoke to a few imagers who had captured this and they told me how faint and difficult it was. It was hit or miss whether I'd pick up anything worthwhile with OSC but I wanted to give it a shot.  These guys were hitting it with 30min exposures in mono.
My 900s exposures showed barely any nebulosity.

After searching on Astrobin, there weren't loads of images of it and I can't find a single image of this in solely OSC.  A first? Maybe.

CTB1 is approx 9780 light years away, spans approx 98 light years in diameter and is thought to be around 10,000 years old.
It was catalogued by George Abell as a planetary nebula as Abell 85 but was suggested to be a SNR by Sidney van den Bergh in 1960.  This was confirmed in 1971 by Willis and Dickel.
A shell rupture can be seen in the top right of the image.

Imaged on the 13th, 17th, 20th and 21st September '20

Preston, UK
Altair Astro Starwave 102 ED-R
Skywatcher NEQ6 Pro
Zwo ASI294 MC Pro
STC Duo (Ha and OIII), Skytech L-Pro Max
Zwo ASI290MM (guiding)
Zwo ASIair Pro

72x 900s  (18 hours)  Ha/OIII
40x 180s (2 hours) RGB stars
48 darks
50 flats and 50 flat darks per session
Ha channel added as luminance
RGB added for stars
Calibrated and integrated in APP, Processed in Pixinsight and PS

Edited September 25, 2020 by Rattler

[Hughsie]

Wow, an amazing image and focus to keep at it. Which constellation is it located in?

[Rattler]

4 minutes ago, Hughsie said:

Wow, an amazing image and focus to keep at it. Which constellation is it located in?

Thanks. It's in Casseopeia.

[Yawning Angel]

Outstanding! Well done 👍🏻 

[geeklee]

Lovely image and great perseverance with the OSC knowing you might not have got much. 

Edited September 25, 2020 by geeklee

[peter shah]

thats no easy target....great job

[Rattler]

Thanks guys.

 

[callisto]

Fantastic, it really pops out at you 👍

 

Mark

[Rattler]

1 hour ago, callisto said:

Fantastic, it really pops out at you 👍

 

Mark

Thanks mate.