CTB1 - supernova remnant in Cassiopeia

[swag72]

Another very faint object and not imaged very often either (obviously for a reason!!) - One of only a few supernova remnants visible from the Northern hemisphere. This extended galactic supernova remnant CTB 1 in the constellation of Cassiopeia is one of the closest SNR's known lying at a distance of about 9,800 light-years away, measuring approximately 98 light-years across. Its age, based on its rate of expansion of the field structure would be between 7500 and 11000 years old. It also has the designation G116.9+0.2, PK 116.9+0.1 and LBN 576.

Details

M: HEQ5

T: Takahashi FSQ85 0.73x

C: Atik 460EX mono 3nm Ha

24x1800s with flats

I was planning on perhaps some colour for this, but, seeing the filamentary stuff above CTB1, I think I'm going to try for a mosaic. From what I can find out on the net, this is part of a new candidate remnant.

So, this is I suppose potentially a work in progress - We'll see how it goes. I'd welcome any comments you may have.

Here's a link to the full res image -

[emadmoussa]

Very nice!

[Welrod50]

I have to say, I am rather fond of seeing DSO's that go beyond the more popular targets. I had no idea that was even there! Thanks for sharing and look forward to seeing it progress. I have to say, to see a colour version would be equally interesting too

[Naemeth]

Absolutely lovely, as usual .

How many panels are you thinking of imaging for the mosaic?

[Gina]

Great image Sara AQnother one for the list Nice and high up too. All we need is a few hours of clear night skies I keep getting set up already to go when the clouds come in!

[rwilkey]

Great picture, a rare bird indeed. Isn't this the one also known as Sharpless 2 - 188 just below Ruchbah? Said not to be a SNR now but a 'planetary' nebula?

[ultranova]

Very nice Sara, love these unusal targets,

I wonder what the apparent mag is on this 14/15 maybe

well done

Paul

[lensman57]

Superb Sara. That is it.

A.G

[swag72]

Thanks all for your comments.

@Robin - This isn't Sh2-188. It was catalogued by George Abell as a planetary nebula but it was suggested by van den Bergh in 1960 and comfirmed by Willis & Dickel in 1971 to be, not a planetary nebula but rather a galactic SNR whose emissions include signal in the optical and x-ray portions of the spectrum.

Phew, thank goodness for Google!!

[jnc71106]

very nice sara and an interesting target. Full hubble ? or Bicolour ?

[rwilkey]

Thanks Sara, really appreciate you coming back to me, as I have been making a close study of Cassiopeia recently and have therefore not come across the SNR in your photo. Thanks once again!

[PNJ]

Just Brill, top draw to you

Paul J

[swag72]

Thanks all - I *think* I will try colour, but not narrowband, I think it will boring old RGB....... perhaps!

[Zakalwe]

Gorgeous image. Sharp as a tack too

[Fay]

That is really great Sara. a really good capture. reminds me of an onion bulb!

Fay

[WaveSoarer]

Great work Sara.

[Mark72]

Great work Sara, it's called Abell 85; you can try to add a bit of O3, could be something like NGC6888, check this image:

http://tvdavisastropics.com/astroimages-1_0000e8.htm

Mark

[cloudbuster]

what with RobH's headphones...and now this! i can't take much more of these rarities!!! well done sara!

bob

[swag72]

Thanks very much all for looking and convincing me that I need some colour!!!

[JamesF]

It does look very pretty. Well done

James

[swag72]

Thanks James!

[Martin-Devon]

Sara, it's a lovely image, and again, a new one that I've not seen before. Congrats on picking out the less-trodden targets and show-casing these.

Martin

[swag72]

Thanks Martin - You know I can't resist the faint and elusive!!

[kirkster501]

Wow that is a cracker! Gee Whiz, 24 x 1800s !!!!!!! Thats half a day. Well done Sara!

I agree for what my opinion is worth - a bit of colour in there.

Steve

[steppenwolf]

An absolutely wonderful image Sara - unusual object, well captured, sharp focus, well tracked - what is there not to like!