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M42, Orion’s Trapezium and some proplyds with short exposures.

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#1 exaxe

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Posted 12 February 2019 - 04:15 PM

Hi ,

I had a little time to finalize this photo of M42 in quick pose.
What's interesting with the fast poses is the ability to photograph objects with sampling a little tighter than usual in the deep sky.

 

clic for full:

40103846463_75d524e54e_c.jpg

 

On M42, we will be able to improve the resolution of the center of the cavity and reveal details, like the proplyds.
The proplyds or protoplanetary discs are very young stars whose disc of dust has not disappeared.
On my photo we see better the biggest as 142-301 and 114-426.
we also see Herbig-Haro objects (objects HH), this is the next step of the proplyds, to finish on T-Tauri stars before the stability of the main sequence.
All this information is the result of an astrometric calibration with Aladin.
It is amazing this app!

 

clic for full:

46344926524_6b142d981f_b.jpg

 

 

I pushed a little treatment on my infrared session with the barlow 3x.
I wanted separate H1 and H2 separately, I found on the internet a snapshot of HST infrared.
The filter they used is more selective, so some stars appear in addition.
The main one is there.

 

clic for animation:

47068642171_d36f03e432_z.jpg

 

 

Technical data:

Everything is done with the ASI224mc and the 300mm F4 with different focal lengths to improve this famous trapeze and to try some proplyds which are in this star nursery which factory with full gas!
the wide shot is composed of 4 images to F4 (the sensor of the 224mc is small) in panoramic mode.
the exhibition chosen was 200ms, gain 420-450, for 54,000 captured and 40000 guarded.
Then for the central cavity, I went to 50ms associated with a barlow 1.5 for 72000 images kept just enough to clear the stars of the trapeze but keeping some nuances in the surrounding gas.
After I mixed catches in ir742 barlow 1.5, expo: 200ms 25000 guarded, the infrared allowed me to improve the stars and reveal some hidden by the cloud.
And I finished, with infrared ir742 and a barlow 3x for the heart, which allows to separate H1 and H2.

the treatment is performed by SIRIL, an extremely efficient software for the treatment of SER with low-contrast objects, this is the case in short exposures.

 

my setup in action:

s38Y5AUVl0GTulMSjFyBYhIU7_o@600x906.jpg

 

Stephane


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#2 Astroman007

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Posted 12 February 2019 - 05:23 PM

Amazing!


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#3 BenKolt

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Posted 12 February 2019 - 06:02 PM

That's a neat composite.

 

And I really like the "over the shoulder" shot of your scope spying on Orion.  I've been interested in setting pictures up like that as well.

 

Ben


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#4 Terry R

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Posted 12 February 2019 - 07:02 PM

Hi Stephane, that is very nice.


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#5 elmiko

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Posted 12 February 2019 - 07:32 PM

Great job Stephanie, very ambitious with amazing results!

Mike


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#6 Narrowbandpaul

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Posted 13 February 2019 - 10:49 AM

My fave image of 2019 so far. Unbelievably good.
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#7 calypsob

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Posted 13 February 2019 - 11:56 AM

I like your use of Alladin to create that museum like display. Your technical approach is fascinating, I am excited to try this type of imaging out one day.  Great work!


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#8 exaxe

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Posted 13 February 2019 - 04:24 PM

thank you Astroman

thank you Ben

thank you Terry

thank you Mike

Thank you Wes, with the 290mm and the 183 there is way to make it please!


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#9 Alekai

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Posted 18 February 2019 - 06:02 AM

Beautiful!

 

Andrea



#10 exaxe

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Posted 18 February 2019 - 03:42 PM

thank you Andrea



#11 CityObserver

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Posted 19 February 2019 - 04:32 AM

That’s fantastic and very interesting.

What is your light pollution like? It looks quite bright from the photo, though I understand it’s a long exposure!

Am I right in understanding that everything is without filters, with the exception of the two sets of ir filtered data?

I’m interested in trying this method myself. Do you do anything else unusual other than ultra short exposures? Did you do a careful select of the data or is that less important since the exposures are short and you have so many images? How much information is in a single exposure? I have attempted short exposures like this but never 25000 - on far fewer with substantially less exciting results! How did you get into this method? Do you have any reccomendations of things to read or try?
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#12 Churmey

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Posted 19 February 2019 - 06:45 AM

Very nice detail and presentation - congrats on a wonderful piece of work.


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#13 H-Alfa

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Posted 19 February 2019 - 07:38 AM

Fantastic result and explanation!

Enviado desde mi MI 5X mediante Tapatalk
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#14 AIP

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Posted 19 February 2019 - 10:05 AM

Gorgeous shot bow.gif  Lucky imaging technique is awesome for this objects.


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#15 exaxe

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Posted 19 February 2019 - 06:09 PM

thank you Cityobserver,I have a little light pollution.
Everything is done without filter, I'm looking for  photon to reduce my exposure as much as possible.
I have mainly lucky imaging for the planetarium and the deep sky.
My EQ6 is quite loaded with the 300mmF4, no autoguiding because is too heavy.
Sorting is essential. As in the astrophoto planetary.I use SIRIL as software.
I must be 250 GB for an image like this.
A large number of images is the key to success. The more choice, the better the result of the deconvolution.
I always dreamed of doing deep sky but my means are limited. As I started to equip myself for the planetarium, I tried with my material luminous objects of the deep sky.
I followed the advice of a friend, A.D. Bonnevie and I push the thing thoroughly!
I have written two articles (one with the collaboration of C.Richard, developer of SIRIL), for French magazines, Astrosurf Magazine.
On my site you must have them ...

thank you Churmey

thank you H-alfa

thank you Aip



#16 Jon Rista

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Posted 19 February 2019 - 08:03 PM

Incredible, as always. Some truly phenomenal detail there!


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#17 exaxe

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Posted 23 February 2019 - 04:04 PM

thank you Jon!



#18 Joe G

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Posted 08 May 2019 - 03:23 PM

Stephane, I missed this.  Saw it on the Siril site.  Really, really awesome!



#19 exaxe

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Posted 08 May 2019 - 03:40 PM

thank you Joe,I have a version with the stars more consistent with the resolution of the overall image:

 

clic for full

a8693466-90ae-487e-a990-360f6f4f2b8e-155




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