28 replies to this topic

[exaxe]

Hi  ,

 

I spent a lot of time on this image (about ten nights), I wanted to have 2 very stable nights to detail and confirm the HL9001 components.
Often we see this small double at the top of another double, more spaced apart, but more rarely the E component, a small star almost stuck to the small double!
the separation between E and the component of the small double is 0.5 arc seconds.
Materials used:
TN 300mmF4, barlow 2.4 and a QHYIII-290MM (photosite of 2.9).
exposure time: 500ms (x17000 for the stars, and x50000 for the nebula), EQ6
gain: 450
format: 8b
color made with my asi224 (with a mix of 2017)

The processing is done with SIRIL (alignment on a star, sum), and the deconvolution / wavelets / noise management with Astrosurface.

 

the full:

https://cdn.astrobin...36_kWXURFLk.jpg

 

more information on this site:

http://www.astrosurf...-triple-hl9001/

 

a montage with the Hubble telescope for a check of the details with my shot. Obviously it's better up there.
I tried to show an expansion of the nebulous but between our different treatments and the location of the standard stars which move it is extremely difficult to confirm!
It is possible but ...:

 

 

Stephane

 

http://astrophoto17.eklablog.com/

https://www.facebook...100016131583271

[Sorana]

Woow!! That is amazing!!  

[sunnyday]

super work you did there , thanks .

[TOMDEY]

Spectacular!    Tom

[namh]

Great work Stephane. Your commitment on this target has been well worth it.

 

JB

[Andreas_Roerig]

Excellent! 

 

Andreas 

[exaxe]

thank you all! it's nice!

[R Botero]

This is superb again from you Stephane!  

 

Roberto

[james7ca]

Stephane, thanks for undertaking this challenge (imaging the fifth member of this apparent double-triple). While your image of the Ring Nebula is certainly a very fine and high resolution capture it may not be apparent to some readers what you mean by the "double-triple HL9001."

 

While I've actually captured four of these stars before using both a C6 and a 9.25" EdgeHD I've often wondering whether any amateur could actually capture the fifth star as you've shown here. So, job well done.

 

Readers who may want some background on this "double-triple" can reference the following post here on CN:

 

  https://www.cloudyni.../#entry10123182

 

In addition to some speculation on this object's true status (a chance optical alignment or a true multiple star system) there is an image that was taken by Hubble that resolves this star group.

[R Botero]

You guys need to post the multiple star image (with a crop) on the Double Star forum.  There it will be properly dissected!  

 

Roberto

[james7ca]

You guys need to post the multiple star image (with a crop) on the Double Star forum.  There it will be properly dissected!  

 

Roberto

Not really, most of these stars are 17th magnitude and fainter. That's one reason why this double-triple isn't that well known, it kind of requires photography to "see." I don't know the magnitude of the so-called "E" component but it has to be well below 18th magnitude.

 

That said, there is also Popovic 192 a 12th magnitude double with a separation of 2.6 arc seconds that is also very close to the Ring Nebula. I identified this other pair in the link I provided earlier and photographically it even has contrasting yellow and blue colors. Also, the more commonly known HL9001 (also discussed in my earlier thread) is definitely visually detectable.

[exaxe]

You guys need to post the multiple star image (with a crop) on the Double Star forum.  There it will be properly dissected!  

 

Roberto

yes it's a good idea

 

Stephane, thanks for undertaking this challenge (imaging the fifth member of this apparent double-triple). While your image of the Ring Nebula is certainly a very fine and high resolution capture it may not be apparent to some readers what you mean by the "double-triple HL9001."

 

While I've actually captured four of these stars before using both a C6 and a 9.25" EdgeHD I've often wondering whether any amateur could actually capture the fifth star as you've shown here. So, job well done.

 

Readers who may want some background on this "double-triple" can reference the following post here on CN:

 

  https://www.cloudyni.../#entry10123182

 

In addition to some speculation on this object's true status (a chance optical alignment or a true multiple star system) there is an image that was taken by Hubble that resolves this star group.

when i had done a search on this triple i came across your post! he enlightened me.

and who are the other 3? (HST and me and ...)

[Jim Thommes]

Excellent Stephane. Great detail - including the double-triple. This is the best M57 I have seen short of the Hubble.

[exaxe]

thank you Jim!

[Mert]

Simply brilliant and stunning detail!

Spectacular is allI can think off, like Jim said, this is the best

image of M57 aart from the Hubble I've seen

[exaxe]

thank you Mert!

[Michael Deger]

Excellent image!

 

Michael

[exaxe]

thank you Michael

[Mert]

You have motiv

ated me to give it a try with my RC8 and an ASI224MC.

First result with little frames already shows some structure!

That was done from my balcony with autofocus refusing to function.

 

Stay well,

Mert

[Louis LeBeau]

fabulous !

resolution and processing is really well done 

thanks for sharing 

[GA-HAMAL]

Nothing but admire

[exaxe]

Mert:Great! where is your post?

thank you Louis!

thank you Ga! I like your comment! he made me laugh

[Mert]

Mert:Great! where is your post?

thank you Louis!

thank you Ga! I like your comment! he made me laugh

Hi Stephane,

 

Don't laught too much (   ), here is my first ever try using

lucky imaging technique on M57 ( and will not be the last attempt )

https://www.cloudyni...-lucky-imaging/

 

Stay well,

Mert

[Peregrinatum]

Looks great!  I'm getting ready to do this myself with the ASI178MM

 

Did you capture with FC, and load an AVI video in to Siril?

 

Will Siril let you inspect each frame and cull out the bad ones?

[exaxe]

thank you Peregrinatum, with the 178 I recommend not too fast exposure times (fairly high reading noise), rather 1-2s to 5s.
I use FC but Sharcap is very good too. on the other hand I use the SER no debayer as video format.
SIRIL is perfect for sorting and stacking, it handles tens of thousands of images from a SER file perfectly without problem