NGC6888 - HOORGB

[mightymonoped]

5 Hours of HOO data plus 2 hours of RGB stars captured over three nights under challenging light pollution but good skies (Bortle 4) from my apartment balcony.

Captured using Skywatcher 80ED Pro (Gold Edition) guided by WO Redcat 51 using ASIair Pro.

ASI294MC Pro -10C unity gain

EQ6-R Pro

Optolong l-eNhance and L-Pro for Narrowband and Broadband honours.

Integrated as 2 separate mosaics using Astro Pixel Processor

Processed in Pixinsight

Finished and Merged in Photoshop CC

Lost a lot of the BB data due to field rotation but the main stuff is there.

Tony

 

[TiffsAndAstro]

That's some incredible detail on the brain

[mightymonoped]

6 minutes ago, TiffsAndAstro said:

That's some incredible detail on the brain

Thanks, I have access to good skies but have to do a lot of local fighting re: the light pollution from the car park.

[TiffsAndAstro]

31 minutes ago, mightymonoped said:

Thanks, I have access to good skies but have to do a lot of local fighting re: the light pollution from the car park.

I'm new ish to astrophotography so not sure of the technical terms but I wonder how you stretch both parts of the mosaic equally/to match each other. Not asking for an explanation but is there a key term or search phrase I can use? 

for YouTube videos

[mightymonoped]

1 hour ago, TiffsAndAstro said:

I'm new ish to astrophotography so not sure of the technical terms but I wonder how you stretch both parts of the mosaic equally/to match each other. Not asking for an explanation but is there a key term or search phrase I can use? 

for YouTube videos

It’s a little bit more involved than just stretching and then merging. The mosaic ‘panels’ are merged while they are in their ‘linear’ (pre-stretched) state using Astro Pixel Processor. In terms of a workflow, I do the following:-

integrate panel 1 (narrowband)

integrate panel 2 (narrowband)

integrate panel 1 & 2 as mosaic (narrowband)

process (stretch and process) narrowband mosaic. 
 

integrate panel 1 (broadband)

integrate panel 2 (broadband)

integrate panel 1 & 2 as mosaic (broadband)

process (stretch and process) broadband mosaic. 

register narrowband and broadband mosaics against each other (in APP)

save registered mosaics (NB and BB)

strip stars from NB Mosaic and save starless NB image  

strip stars from BB Mosaic and save Stars from BB image

merge Stars from BB image with Starless NB Mosaic  

 

Edited May 20 by mightymonoped

[TiffsAndAstro]

1 hour ago, mightymonoped said:

It’s a little bit more involved than just stretching and then merging. The mosaic ‘panels’ are merged while they are in their ‘linear’ (pre-stretched) state using Astro Pixel Processor. In terms of a workflow, I do the following:-

integrate panel 1 (narrowband)

integrate panel 2 (narrowband)

integrate panel 1 & 2 as mosaic (narrowband)

process (stretch and process) narrowband mosaic. 
 

integrate panel 1 (broadband)

integrate panel 2 (broadband)

integrate panel 1 & 2 as mosaic (broadband)

process (stretch and process) broadband mosaic. 

register narrowband and broadband mosaics against each other (in APP)

save registered mosaics (NB and BB)

strip stars from NB Mosaic and save starless NB image  

strip stars from BB Mosaic and save Stars from BB image

merge Stars from BB image with Starless NB Mosaic  

 

thanks for all this. i assumed it was more involved, but this shows me just how much. 

[Roy Foreman]

Good image. Nice to see the nebula in context of all the red Ha surrounding it.