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  4. » Hubble Bubble

 
Hubble Bubble...

Astrofotografia

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Hubble Bubble sent on August 01, 2016 (9:46) by Silbre. 28 comments, 1011 views.

Primo approccio all'astrofotografia La Nebulosa Bolla si trova a 8.000 anni luce da noi, nella Via Lattea, in direzione della costellazione di Cassiopea. Si tratta di una gigantesca palla di gas e polveri 'gonfiata' dal vento prodotto dalla stella che si trova non al suo centro, bensì spostata sulla sua sinistra, tra le dieci e le venti volte più massiccia del Sole.


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avatarsupporter
sent on August 01, 2016 (10:26) | This comment has been automatically translated (show/hide original)

I have not figured out if you made it, and with what?

avatarjunior
sent on August 01, 2016 (10:46) | This comment has been automatically translated (show/hide original)

Let's say that we did it as a team as they are seven hours of shots with astroinseguitore in the dome.

avatarjunior
sent on August 01, 2016 (10:47) | This comment has been automatically translated (show/hide original)

We then processed the images with PixInsight

avatarsupporter
sent on August 01, 2016 (11:40) | This comment has been automatically translated (show/hide original)

congratulations for the lavorone

avatarjunior
sent on August 01, 2016 (12:07) | This comment has been automatically translated (show/hide original)

2 nottataccie but great satisfaction :-)

avatarsenior
sent on August 01, 2016 (15:11) | This comment has been automatically translated (show/hide original)

Nice work, but it is not too green? The photos that I see usually have a blue color in the center and then fade into the red

avatarjunior
sent on August 01, 2016 (15:54) | This comment has been automatically translated (show/hide original)

We used a CCD sensor, and then for some shots applied the three filters, oxygen, hydrogen and sulfur, the colors you see are dictated by these filters, in post and 'preferred not to interfere much.

avatarsenior
sent on August 01, 2016 (18:58) | This comment has been automatically translated (show/hide original)

Do not hate me but quoto Gianluca ... I think you messed with PI and then you went on tilt (it is human), PixInsight is a very powerful program, and made no mistake alone. The photo is in two colors: fuchsia and green which is not possible with the O ... H and S was to come out of a masterpiece with the Hubble color palette. And if you like it, then forget it.

avatarjunior
sent on August 01, 2016 (20:54) | This comment has been automatically translated (show/hide original)

For the dominant green we tried various profiles even that indicated to you but there was no way to mitigate this impact, we definitely made some mistakes as it is the first ever attempt to do with astrophotography and PixInsight
For the molecular flux l 'we attenuated pp with fotoshop.

avatarsenior
sent on August 01, 2016 (21:06) | This comment has been automatically translated (show/hide original)

I agree with Beppe, definitely a mess PP because with seven hours of integration, the CCD and the result used filters must be much better; even the stars are all surrounded by a purple halo.
I had not read the exposure time but given the number of hours is certainly more signal to pull off.
You have to try to rework with PixInsight :-)

avatarjunior
sent on August 01, 2016 (21:18) | This comment has been automatically translated (show/hide original)

The photo is green because the Bubble nebula emits nell'Halfa especially with a little something nell'OIII. Surely you used SII for red, for green and OIII Halfa for blue, with this result. Try not to use the SII and the technique Ha-OIII-OIII for the RGB file, you will see that will change a lot. Unfortunately the color of the stars will not be the "natural," he had to take back the frames in RGB true then this give the real color to the stars.

avatarjunior
sent on August 01, 2016 (21:19) | This comment has been automatically translated (show/hide original)

YES care mind tried again, cmq increments of 5 minutes and manual guide :-)

user44198
avatar
sent on August 25, 2016 (20:30) | This comment has been automatically translated (show/hide original)

... Surely you've implemented the right tutorial ... I have not used the ScreenTransferFunction, this parameter allows you to remove any dominant initially present at the shooting, and is just one of the advantages to be exploited with this powerful software .. ..
then if I write that are 7 hours of integration well then the mistake is for sure ....




user44198
avatar
sent on August 27, 2016 (12:24) | This comment has been automatically translated (show/hide original)

... Here is an attempt to level the picture ... I sent you that I got the autosave with PixInsight ...




avatarjunior
sent on August 27, 2016 (21:23) | This comment has been translated

Thanks a lot!

avatarsenior
sent on August 28, 2016 (3:22) | This comment has been automatically translated (show/hide original)

Sorry for the intrusion but as I find interesting the topic, I'm trying to figure out myself. So in summary if I understand as highlighted Skylover, here there are only three channels in Ha, OIII and SII, then the intervention of a new production of Richard with PixInsight, channels have been optimized separately before being assembled and processed the ousting of ionized sulfur channel (SII), responsaile the green haze of the Bubble. Then it was also evidenced that lack of all RGB channels, responsible for the absence of colors not only the stars but of the whole field again .... So the pictures processed by Vega is not final, can / could be integrated into a later taken up by other frames for each RGB channel for maximum color dynamics, and why not, a puree through Photoshop. Right?

avatarjunior
sent on August 28, 2016 (9:57) | This comment has been automatically translated (show/hide original)

We are working x 'is my that his leave something' to be desired, Richard has never worked with CCD me much less, if we see a Third helps us.
The online tutorials are scarce, cmq worked in PS there is you.
Thank you

user44198
avatar
sent on August 28, 2016 (13:33) | This comment has been automatically translated (show/hide original)

Well a consideration seems to me a duty: I nn I never worked with CCD, but I have developed their images in RGB or LRGB with classical procedures .... PixInsight HP technique requires much more attention as it has to do with lengths wave nn that are visible in the classic RGB .... so my approach was dictated by a desire to try and the result is what it is ..... I tried to reproduce the endless images of this technique according me nn is exactly the best made from the ground with known disorders that bears our atmosphere and that's why there is a flood of interpretations of this object but nn knowing which is the one that comes closest to reality .... I personally nn I incline to this technique that I willingly leave to the HTS ...

avatarsenior
sent on August 28, 2016 (17:15) | This comment has been automatically translated (show/hide original)

Riccardo clear, better than that you could not do ;-) Anyway Silvia is admirable constancy and determination that puts us in this endeavor despite the difficulties, despite all this is a step forward. :-)

avatarjunior
sent on August 28, 2016 (20:54) | This comment has been automatically translated (show/hide original)





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