Simeis 147 in Ha

[Knight of Clear Skies]

Aka the Spaghetti Nebula, another image from the end of February. Astonishing to think a 40,000 year old supernova remnant is still visible across 3 degrees of the sky. It's thought that the progenitor was once a member of M36 in Auriga, and it left behind a pulsar.

(~1h56m, 3 minute subs, 1100D and Samyang 135mm f2). Does anyone know what the small, almost featureless blob of Ha at lower right is please? I thought it was a flare from a bright star to begin with. I also wonder if the faint material surrounding it could have been ejected before the progenitor went supernova.

Here's the inverted version.

Not an easy target for a DSLR, took a lot of work to isolate it from the background. But it looks good if I move my chair back from the monitor. Would have been a much better target for the 1600MM cool which would also have framed it more tightly.

A bit bigger, but may not be worth posting it this size...

[Knight of Clear Skies]

Here's its location on the border of Auriga, it's much closer to the Flaming Star Nebula than I'd realised.

The small nebula I noticed is Sh2-242 and is thought to be nearly 9,000 light years away, in the Perseus arm of the Milky Way.

[tooth_dr]

2 hours ago, Knight of Clear Skies said:

Here's its location on the border of Auriga, it's much closer to the Flaming Star Nebula than I'd realised.

The small nebula I noticed is Sh2-242 and is thought to be nearly 9,000 light years away, in the Perseus arm of the Milky Way.

Very good job there. This one is highly on my radar. I recently was imaging Auriga and tried to frame this via the viewfinder on my DSLR, working from the tadpoles, but I wasn’t just quite in the right place that I see yours.

Really well done ?? 

 

[Seanelly]

I'd be interested to hear an answer to your 'material' question, but either way, this image is vibrant and captivating.

[ollypenrice]

Great image. When seen with the Flaming Star its angular size is astounding.

Olly

[Vixen4eva]

I assume your using a 12nm Ha filter? I`d love to see a sub if i could see one?

Regards

Alan

[tooth_dr]

Could this be done in normal colour or is it too faint?

[coatesg]

6 minutes ago, tooth_dr said:

Could this be done in normal colour or is it too faint?

I have just detected it before in 6.5hrs of exposure using a modded 350d and a 85mm lens at ISO400, f4 : https://www.chromosphere.co.uk/2017/12/18/widefield-flaming-star-and-spaghetti-nebulae/

A cooled cam with better response would improve things, but it's very faint and I'd expect days of exposure would be needed to get anything approaching the contrast above...!

[tooth_dr]

31 minutes ago, coatesg said:

I have just detected it before in 6.5hrs of exposure using a modded 350d and a 85mm lens at ISO400, f4 : https://www.chromosphere.co.uk/2017/12/18/widefield-flaming-star-and-spaghetti-nebulae/

A cooled cam with better response would improve things, but it's very faint and I'd expect days of exposure would be needed to get anything approaching the contrast above...!

Thanks Graeme.  I laid your image side by side one I recently took, and I can now just make out the spaghetti nebula.  I've not way of adding H-alpha to the image train without reducing the aperture too much

[Knight of Clear Skies]

Thanks for the comments, sounds like this one is a bit more successful than I thought. While the Veil is spectacular 147 looks more like the aftermath of an explosion.

19 hours ago, tooth_dr said:

I recently was imaging Auriga and tried to frame this via the viewfinder on my DSLR, working from the tadpoles, but I wasn’t just quite in the right place that I see yours.

 

I kept overshooting and hitting either the Flaming Star or Monkey Head on either side. But once I had it in view I could just see it in a 30 second framing shot, so I was able to nudge it into the centre. I checked against some deep images to make sure I wasn't cutting anything off, I couldn't see the fainter extensions.

18 hours ago, Seanelly said:

I'd be interested to hear an answer to your 'material' question, but either way, this image is vibrant and captivating.

Thinking about it some more, I suspect the supernova would have swept up any precursor eruptions by now, it's had 40,000 years to catch up. There is a lot of faint Ha extended signal in the area. But I really don't know.

6 hours ago, Vixen4eva said:

I assume your using a 12nm Ha filter? I`d love to see a sub if i could see one?

Yes, the 12nm clip-in. I'll try and post up a single sub when I get the chance, but feel free to PM me if I forget.

6 hours ago, tooth_dr said:

Could this be done in normal colour or is it too faint?

You'd get something in RGB but probably no more than the brighter filaments. I recently imaged the Rosette and Cone in RGB and Ha and the difference was striking. I didn't get much of the outer extensions of the Cone region in RGB and 147 appears to be of similar brightness or a bit fainter. (There is an all-sky H-Alpha map in WWT, which is useful for this kind of comparison.)

[Vixen4eva]

Sadly its too late this year but its on my list for the end of the year...

Alan

[Guest]

Excellent image!

David