Celestial hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  HD213056  ·  HD213069  ·  Helix Nebula  ·  NGC 7293
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NGC7293 Helix Nebula SOH + RGB Stars, Gary Seven
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NGC7293 Helix Nebula SOH + RGB Stars

Revision title: Helix Nebula - Color Improvement

Getting plate-solving status, please wait...
NGC7293 Helix Nebula SOH + RGB Stars, Gary Seven
Powered byPixInsight

NGC7293 Helix Nebula SOH + RGB Stars

Revision title: Helix Nebula - Color Improvement

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Description

After the Sculptor Galaxy last year I told myself I would not shoot that low to the south again. In addition to only having 3 hours per day above 30 degrees elevation, I was looking back towards the light pollution and heat turbulence of the city. But like a moth to the flame ...

R: 31 x 60s
G: 31 x 60s
B: 30 x 60s
S: 40 x 300s
O: 45 x 300s
H: 40 x 300s

Total integration 13h 29m

Comments

Revisions

  • NGC7293 Helix Nebula SOH + RGB Stars, Gary Seven
    Original
  • NGC7293 Helix Nebula SOH + RGB Stars, Gary Seven
    B
  • Final
    NGC7293 Helix Nebula SOH + RGB Stars, Gary Seven
    C

B

Title: Helix Nebula PixInsight reprocessed in H-O-O

Description: Going back through my previous images, I just could not get a good result on this one. Eventually I traced the problem back to my SII data which was both weak and noisy. So, this marks my foray into the world of HOO imaging.

And since this one looks so evil, I cropped and rotated just a bit differently ;-)

Uploaded: ...

C

Title: Helix Nebula - Color Improvement

Description: There are many images that call out for reprocessing as I learn more about PixInsight. But there was one that screamed out for it. This one! Every time I went to my Astrobin page those ugly colors just kept staring back at me like some type of ugly eye. So here it is.

In this revision, the S-II is added back in. I also experimented with stretching the narrowband channels individually vs. stretching after combining them. I preferred the result of the Before Combine option. Each channel had a rather large pedestal, so matching them up was very easy to do by adjusting the offending black point(s), and I could still make small "tuning" stretches (individual or RGB) in GHS.

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC7293 Helix Nebula SOH + RGB Stars, Gary Seven