CG4 "Hand of God" in Ha RGB

[Bassnut]

Hi Guys

Cometary globule, CG4. This is usually imaged in RGB. Ha as Lum (HaRGB) gave quite a different perspective. Ha was very dim, 1 hr subs were required.

Large here. (https://fredsastro.smugmug.com/Photography/Astrophotography-1/i-t47NgNw/A)

Taken on an RCOS 10" RC Scope at f9, SBIG STXL6303E Camera and PME mount at itelescopes Siding Spring Observatory.
Processed with CCDstack, Star Tools and Photoshop. 98 hrs Total exposure time.

[Bart]

I like it a lot although the histogram looks badly clipped. :question:

98 hours??:eyepop::eyepop:

[Placidus]

That's utterly magnificent! Yours looks remarkably like the ESO version.

Now we know what you've been doing for the last 98 years.

Brilliant and definitive.

Yes, Bart's right about the black end of the histogram. Easy to fix.

[h0ughy]

Wow what a marathon image

[Peter Ward]

Fred!! Maaaate!
A whole new perspective... Simply awesome. :thumbsup::thumbsup::thumbsup:

[redbeard]

Stunning,

I checked out your website and wow, some amazing images. Do you secretly own the Hubble?

Cheers,
Damien

[billdan]

Great image of CG4 Fred, 98 hours with 1 hour subs in Ha, you must be looking at a part of space with no satellites passing through.

Cheers
Bill

[Geoff45]

Beautiful Fred. Nothing beats long cposure time.

BTW why did you stop at 98 hours? Should have gone for the ton.

[atalas]

Hi Fred

Yeah your not kidding Fred.....a different prospective alright!detail I haven't seen before.....excellent :thumbsup::thumbsup::thumbsup:

[multiweb]

Very fiery. Looks like those lava runs in the big island in Hawai. :thumbsup:

[RickS]

Very cool, Fred! Looks like a radioactive Dune sandworm to me :)

[Placidus]

Exactly so.

[Andy01]

Oh wow Fred, that’s a hell of an effort, 98hrs? Wow!
Awesome.....!!!!! :thumbsup:
It looks so 3D.
So much detail :eyepop:
I’ve had a good crack at this one myself with maybe 12 hrs of Ha but you’re
The king of integration here.
Quick question- why did you frame it like that?
It’s missing the tail end... :question:
Anyway, amazing stuff, the sandworm looks fantastic! - very well done :thumbsup:

[gregbradley]

That's a spectacular image Fred. Congrats.

Greg.

[strongmanmike]

Definitely a new perspective on this object, cool shot Fred :thumbsup:

Mike

[Atmos]

I'm not sure if this is one that I've seen before but 98 hours :eyepop:!!!
You've sure gone deep and the detail is exquisite.

[SimmoW]

Wow, just wow, well done Fred! Crazy long integration time and such a dramatic look

[Bassnut]

Thanks Bart, Mike n Trish, despite the hrs, the background was still noisy and messy, so I clipped it, the hand was better isolated from it.



Cheers David. Now I know why Ha on this isnt common, needed the hrs!



Thanks Peter. Not up to your processing standards ;), but it was fun going different.



Thanks Damien. I do have a spot for the scope to do stupid hrs easily, thats my Hubble cheat :D.



Thanks Bill. There were a few satellite trails, but given enough subs, they are easily dismissed with data reject :thumbsup:



Thanks Geoff. I did a bit more than the ton actually, quite a few subs were rejected. Its painfull rejecting 1 hr subs, wasted hrs mount up pretty quickly :P



Thanks Louie. I did try OIII and SII, but nothing there, because its a reflection neb I guess. With Ha as lum, even red showed quite differently to RGB shots. The RGB subs were also 1hr at bin2.



Cheers Marc. Its a bit over red, but green was unattrative on this, it does look like flouro lava :)



Thanks Rick. Lack of sand ;)



Thanks Andy. I didnt properly frame it, lost the tail and also the galaxy it was trying to grab unforch, which is a real shame. I dont rotate much these days, a bit lazy. Anyway, pointing straight up looked good (and a bit different).



Thanks Greg



Cheers Mike.



Thanks Colin, Its the 1st time ive done it.



Thanks Simon

[markas]

Dramatically different! Great result.


Mark

[tornado33]

Very impressive, I wonder where the Ha emissions are coming from, is it in the nebula itself or refection from somewhere else?

[Paul Haese]

An epic integration Fred. Interesting detail of this object. I really must give this one a go myself one day soon.