Print Page - North America Nebula

Title: North America Nebula - The Wall
Post by: Carole on Nov 12, 2016, 20:05:58

This was the image that I struggled with on Guy Fawkes night in my "Trials of Imaging" thread.
As stated I had trailing problems with subs longer than 500secs, so had to do a little bit of cheating on this process, I erased the stars on the 15min image stack using Straton, and then overlaid the 500secs Ha subs which put the stars back.

Get so little time to image these days I didn't want to waste the data.

This is another example of where I probably need dark skies for the Oiii and Siii components, though I have never done such short binned images before, so maybe I should have taken longer subs (was experimenting). Wasted so much time trying different length Ha subs to see where trailing started which prevented me from doing more subs of Oiii & Sii.

First light for my SW130PDS, Atik460EX, NEQ6, PZT
Ha 5 x 900secs + 2 x 500secs
Oiii 3 x 150secs binned
Sii 4 x 150secs binned

Looks better if you don't zoom in.

(http://cdn.astrobin.com/images/thumbs/2a3431231f92188b556b22a373d12137.1824x0_q100_watermark_watermark_opacity-2_watermark_position-4_watermark_size-M_watermark_text-Carole%20Pope.jpg)

Title: Re: North America Nebula - The Wall
Post by: MarkS on Nov 13, 2016, 10:23:22

I like it. It obviously needs a lot more data but it's looking good.

Mark

Title: Re: North America Nebula - The Wall
Post by: Carole on Nov 13, 2016, 10:39:33

Thanks Mark, yes trying to get enough data is a real problem given the weather.

Carole

Title: Re: North America Nebula - The Wall
Post by: julian on Nov 13, 2016, 10:46:48

That is looking very good Carole.

Title: Re: North America Nebula - The Wall
Post by: Carole on Nov 13, 2016, 11:19:38

Thank you Julian.

Carole

Title: Re: North America Nebula - The Wall (revised)
Post by: Carole on Nov 13, 2016, 16:12:51

I have brightened and sharpened it up a bit, also tried to reduce the noise.

(http://cdn.astrobin.com/images/thumbs/d3105e3aee309d63cde79027e54852c2.1824x0_q100_watermark_watermark_opacity-2_watermark_position-4_watermark_size-M_watermark_text-Carole%20Pope.jpg)

Carole

Title: Re: North America Nebula - The Wall
Post by: Fay on Nov 13, 2016, 18:17:09

Thats is really nice Carole, you earnt it!!!!

Fay

Title: Re: North America Nebula - The Wall
Post by: Carole on Nov 13, 2016, 18:44:58

Thank you Fay.

Carole

Title: Re: North America Nebula - The Wall
Post by: JohnP on Nov 14, 2016, 15:16:29

Nice - there are quite a few hot pixels on full size image? John

Title: Re: North America Nebula - The Wall
Post by: Carole on Nov 14, 2016, 16:17:43

You're right I had not noticed them.

Carole

Title: Re: North America Nebula - The Wall
Post by: RobertM on Nov 14, 2016, 20:28:25

That's looking very good Carole. As John pointed out there are a number of hot pixels but it still shows much promise, you just need a bit of extra data (as we always do).

Robert

Title: Re: North America Nebula - The Wall
Post by: Carole on Nov 14, 2016, 23:59:05

Thanks Robert,

Well hopefully I shall be able to get some more data before Cygnus disappears so I can keep the camera orientated the same. This should act as a dither, so hopefully will eradicate the hot pixels.

Carole

Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: Carole on Nov 12, 2016, 20:05:58