NGC6164/65 - Ejection Nebula in Norma

[EddieT]

Hi all,

here's one I've been meaning to take for years but never got around to until last weekend.

This nebula is in Norma and also in the outskirts of the huge emission region NGC6188 in Ara. Like Thor's Helmet it's driven by a wolf-rayet star mag 6.7 SAO226891 in the center of the image.

Hope you like it.

More info and a larger version is available here http://astroshed.com/st10pics/6164.html

[[1ponders]]

Lovely shot Eddie. Looks like a xmas tree decoration. :cool2:

[atalas]

Yep top shot from the Eddie !


Louie :eyepop:

[Orion]

Beautiful shot Eddie. :thumbsup:

[ving]

thats wonderful eddie. great shot!

[EddieT]

Thanks David, Ed, Louie and Paul. It's an interesting object and quite difficult with that bright star smack in the center.

[Astroman]

Keepiing up with your usual standards there Ed, well done, brilliant shot.

[Dennis]

Cosmic Eddie - just cosmic.........can't really say much more than that.

Cheers

Dennis

[tornado33]

Thats VERY good for even a scope of considerably bigger aperature. Nice and deep too, with the faint nebulosity running to the star visible.
Scott

[iceman]

Beautiful image Eddie, i love the diffraction spikes on the bright star.. very nicely framed.

[EddieT]

Thanks Andrew, Dennis, Mike and Scott! I'm really happy with the outcome. I thought that the bright star was going to make it very difficult to bring out the dim inner nebulosity, but the long focal ratio tamed it considerably and allowed 10-minute exposures without too much blooming. Mixed blessings from the slow optical system.

Dennis, looking forward to Astrofest again this year! It's be good to catch up with you again.

[GrampianStars]

Eddie and the Star Cruisers :thumbsup:

top shot i'm envious

[EddieT]

Thanks Robert,

BTW, there is a typo in the web address in your profile.

[Striker]

Awesome Eddie.....

Over the generations to come I will be able to pass onto my kids and grand childen that I new Eddie.....Wow.

[EddieT]

Thanks Tony. You'd better stop though before I have to replace all of my hats :)

[xstream]

Magnificent image Eddie.
Your images are a credit to yourself; take a bow mate. :bowdown: :thumbsup:

[EddieT]

Thanks John. nbkkj zf

I bowed and hit my head on the keyboard. :)

[[1ponders]]

Eddie, how do you decide which objects your are going to image. do you have a plan you're working through or do you just throw a dark at a sky map???

[EddieT]

Hi Paul,

I have a fairly large object schedule for various publications that I try to adhere to. Many of the latest objects have been requested and/or commissioned.

But sometimes there may be no scheduled objects readily placed. Then I'll draw on personal preference to pick something that is well-placed, usually I try to pick something bright if this is the case. Over the years there has been many objects I've wanted to image but never got around to, and there are others that I was never completely happy with that I've wanted to re-image.

There are also many bright southern patches in my milky way mosaic that have rarely been imaged to any great depth or resolution, that I want to take at longer focal length to see just what's there. I've done a few using the mosaic as a reference with excellent results. It's amazing how many large bright patches we have down here that have never been deeply imaged.

[[1ponders]]

Thanks Eddie.

If you had to choose just one, and only one object to image, which one would you choose and why? Sorry to put you on the spot (not really :lol: ), but I'm be really interested to know.

[EddieT]

Wow! One object? Hmm. It would have to be something spectacular that noone has imaged yet :)

There are many. There is a huge shell around M57 that usually is not visible at all in images of the ring, but some adventurous souls have managed to image it in great detail by using exposures ten+ times longer than needed to image the Ring nebula itself with great clarity. I'd like to see if a similar shell exists around the Eight-Burst planetary in Vela. If it does, I haven't seen it.

Then again, there are many awesome patches in Vela, associated with the SNR that deserve special attention.

Ok, sorry, but I can't answer your question :)

[[1ponders]]

:lol: Gotcha thinkin' though :) An object for next years award maybe :thumbsup:

[cometcatcher]

Fantastic image for a 6 inch scope Eddie.

Is that over 5.5 hours total combined exposure? I think that's about how long our skies stay clear for all year lol.

[ErwinvdVelden]

Great shot Eddie!

You used quite a bit of noise reduction on that one, no wonder with that kind of focal ratio... Ever considered getting one of Jim Riffle's creations like the Centurion 18 inch f/2.8? ;-)

See you at Astrofest.

Cheers,

Erwin

[EddieT]

Thanks Kevin,

:) That's a short one for me !

[EddieT]

Thanks Erwin,


Not at all. The only noise reduction was in the Sigma combination of the raw images. Even the sum of the dark-subtracted raws looked very smooth except for cosmic ray hits. Probably due to the fact that it was a very cold night. The camera was operating at -24C which I can rarely get it down to.
I have considered it but as usual it all comes down to money :)

[ErwinvdVelden]

Hi Eddy,

In that case it looks like a very smooth object indeed and a very low noise level.

Cheers,

[EddieT]

Erwin,
Yes I was amazed myself. In three years this is the first time I have gotten the camera below -20 and the difference was impressive! Even the 10 minute dark frames looked smooth!

[tornado33]

Hi Eddie, is your camea air cooled? I guess you could consider liquid cooling to get the cold temps on warm nights.
Scott

[EddieT]

Hi Scott,
Yes it's air-cooled. It is water-cooling ready, just needs a pump, hoses and a bucket. I have bad memories of water-cooling from the cookbook days. It was a messy business :) But still, I did reconsider it last summer. Reports are that it will give an extra 6 degrees C of cooling. Which doesn't sound like much, but is significant in terms of thermal noise reduction.