Jump to content


© D Elijah
Credit Please credit D Elijah if you want to use this image.

Packman Nebula NGC 281


Date of image 29/07/2016

The Packman nebula NGC 281. Processed using DSS. 

Hardware details: Camera: Canon 600D (astro modded). Telescope: SW Evostar 120 with Baader UHC-S filter. Mount: AZ-EQ6 guided using a ST80 synguider. Image details: Lights: ~40 x 3min at ISO 800, Darks: 50 x 3min 0 sec at ISO 800 (from dark library), Lights and darks separated by 30 sec intervals. Flats: 50 x 1/50s at ISO 800, Bias: 50 x 1/4000 at ISO 100.

I have been trying to capture this nebula for a while now because Cassiopeia is really well placed for a full nights imaging.

Atmospheric transparency was excellent, no clouds after 00:00. Auto guiding was reasonably stable, but there was quite a lot of corrections in the RA axis, I used some east heavy balancing and reduced the RA aggressiveness of the auto guider.

I increased the saturation by 30% and manually aligned the colour channel histograms. I stretched the red, green and blue channels by about the same amount to try and show the subtle difference in colour. I have noticed some darkening round the edges of the image that could be vignetting or a result of the smaller stack size in these regions. What ever it is, it was not corrected by the flats.

I actually like the subtle tones in colour throughout the nebula - I didn't think I caught this detail looking at the individual frames. I didn't want the H alpha red to overpower the other emissions so I stretched the colours accordingly.


Please credit D Elijah if you want to use this image.


© D Elijah

From the album:

Photos from Bury

· 91 images
  • 91 images
  • 1 comment
  • 53 image comments

Photo Information

Recommended Comments

There are no comments to display.

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.