Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1795  ·  NGC 896
NGC 896 - The Fishhead Nebula [Bicolor], jdifool
NGC 896 - The Fishhead Nebula [Bicolor], jdifool

NGC 896 - The Fishhead Nebula [Bicolor]

NGC 896 - The Fishhead Nebula [Bicolor], jdifool
NGC 896 - The Fishhead Nebula [Bicolor], jdifool

NGC 896 - The Fishhead Nebula [Bicolor]

Equipment

Loading...

Acquisition details

Loading...

Description

This is a follow-up of my Ha-only version. I was able to add a few more Ha subs and collected OIII data as well. But the weather was still not very cooperative and in turn the resulting images suffer from a lot of noise.

As with the Ha version i used 2x drizzle and cropped the image for a closer view of the fishhead.

To create the rgb images i used the pixelmath expressions listed below. I then applied the LRGBCombination script using Ha as the luminance layer.

Revision A

R: iif(Ha > .15, Ha, (Ha*0.8)+(OIII*0.2))

G: iif(Ha > 0.5, 1-(1-OIII)*(1-(Ha-0.5)), OIII *(Ha+0.5))

B: iif(OIII > .1, OIII, (Ha*0.3)+(OIII*0.2))

Revision B

R: Ha

G: OIII

B: OIII

Comments

Revisions

  • Final
    NGC 896 - The Fishhead Nebula [Bicolor], jdifool
    Original
  • NGC 896 - The Fishhead Nebula [Bicolor], jdifool
    B

Sky plot

Sky plot

Histogram

NGC 896 - The Fishhead Nebula [Bicolor], jdifool