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Contains:  NGC 3572, NGC 3532, NGC 3503, NGC 3496
Getting plate-solving status, please wait...
NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB, 





    
        

            Andys Astro
NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB

NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB

Technical card

Resolution: 2328x2877

Dates:March 1, 2017

Frames:
Astrodon Gen2E Luminance: 6x900"
Astrodon Ha 1.25 3nm: 18x1800"
Astrodon O-III 3nm: 8x1800"
Astrodon S2 3nm: 8x1800"

Integration: 18.5 hours

Flats: ~15

Flat darks: ~10

Avg. Moon age: 3.06 days

Avg. Moon phase: 10.26%

Astrometry.net job: 1558632

RA center: 166.720 degrees

DEC center: -59.157 degrees

Pixel scale: 3.289 arcsec/pixel

Orientation: -4.564 degrees

Field radius: 1.691 degrees

Locations: Burwood, Melbourne, Victoria, Australia

Description

Here we have NGC 3532, very near it's much more famous and well documented neighbour the Eta Carina Nebula (NGC 3372). It's a beautiful cluster to observe visually, but much more challenging to do it justice in a photograph!
I've taken this from my backyard in suburban Melbourne, Australia, during an unprecedented run of 5 clear nights during new moon. It started off as straight narrowband, but while there is plenty of Ha, there is less O3 & S2 to make a balanced HST palatte image. So I've included the IDAS filter into the image train and attempted to blend the NB data with LRGB from light pollutionville.

Ha 8hrs - 30min subs
O3 4hrs
S2 4hrs

LRGB 6x20min subs ea = 4hrs
total Integration time 20hrs.

Processing the LRGB was an interesting challenge to bring back the star colours, even when using the IDAS filter. So lots of photoshop technique was used here. I then added back the Ha, to make HaRRGB, then blended back in the O3 & S2 using HST mapping.
Finished with NIK filters for overall colour aesthetics and seasoned to taste.
Thanks for looking, comments welcome!

Andy

Comments

Author

Andys_Astropix
Andys Astro
License: None (All rights reserved)
2612
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Revisions

  • NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB, 





    
        

            Andys Astro
    Original
  • NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB, 





    
        

            Andys Astro
    B
  • Final
    NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB, 





    
        

            Andys Astro
    C

B

Tweaked star colours to increase the cyan/blues & reduced star sizes for a more 3D effect. Andy

C

Reprocessed, extracted more Ha detail from the background and redid the RGB stars - an overall improvement :)

Sky plot

Sky plot

Histogram

NGC 3532 - Wishing Well Cluster & friends in Ha O3 S2 LRGB, 





    
        

            Andys Astro