Jump to content

Walking on the Moon

Then, and Now. Helix Nebula revisited...


Recommended Posts

So I appear to have the rest of the week in the blues. Clear Skies Chart.

I ran up my alignment, and adjusted my Polar Alignment, per usual. Then started hopping about and collected a few more Messier targets. But I really wanted to find some of my favorites, Nebulae.

My thoughts turned to the Helix Nebula from last year, so I pecked it into Stellarium and it was in my Southern skies and pre-meridian. So I let Stellarium slew me to it and took a shot. Bust my buttons it was almost centered! So I tried a few imaging runs. It crossed the meridian, so I did a meridian flip. I had a bit of difficulty finding it in my imaging camera, but it was my fault for running too short of times. Once I got the ghost in view, I just took a giant leap of faith and took an 800 second one shot color image. That came out nice, but a bit under exposed.

So I entered in a 1200 second image and sat back while the 20 minute exposure cooked away. And I kept at it until I was about to lose my target to a tree.

So I think I've made a little progress over the last year with my imaging... :tongue: As shot, no additional post processing, fit > jpg.

11-06-15 800s.jpg

1200s RGB Ha7nm 3.jpg

Edited by SonnyE
sPellin korectchon
  • Like 3
Link to comment
Share on other sites

40 minutes ago, wimvb said:

That's a great improvement. Is the second image a single sub? You seem to have hot pixels left that should calibrate out.

Thank You, Wim.

Yes, I haven't quite got that figured out. I use an Orion G3 color Deep Space camera. And in color modes I get the "rainbow sprinkles". The longer the exposure, the worse they can get. :dontknow:

If I save the image as a jpg, I can adjust the sprinkles to stars, like I've done here, in Adobe Photoshop with Topaz filtering. But it is like fingernails on a chalkboard to me to do post processing. I'm having to come around to post processing, but I'm kicking and screaming getting there. :hmh:

First image is an 800s RGB, Second image is the same 1200s as above, just post processed a little bit. (Which is about all I am capable of so far.)


800s RGB Ha7nm A.jpg

1200s RGB Ha7nm 3A.jpg

Edited by SonnyE
Link to comment
Share on other sites

The "sprinkles" as you call them, are hot pixels. You can correct for them by taking a dark frame and subtract that from the light frame. Ideally you would take many frames and stack them in a program such as Deep Sky Stacker, but you may have some success correcting single frames in a program that can process raw images (even tif). I have done this occasionaly in RawTherapee (freeware).

There is a lot of information and knowledge in this forum, just a click of a mouse away.

Good luck

  • Like 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.