Hemisphere:  Southern  ·  Constellation: Tucana (Tuc)  ·  Contains:  47 Tuc Cluster  ·  NGC 104  ·  NGC 292  ·  NGC 346  ·  NGC 362  ·  Small Magellanic Cloud  ·  The star λ2Tuc  ·  The star λHyi  ·  The star πTuc
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Small Magellanic Cloud - RGBHaO3, 



    
        

            Rodney Watters
Small Magellanic Cloud - RGBHaO3
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Small Magellanic Cloud - RGBHaO3

Getting plate-solving status, please wait...
Small Magellanic Cloud - RGBHaO3, 



    
        

            Rodney Watters
Small Magellanic Cloud - RGBHaO3
Powered byPixInsight

Small Magellanic Cloud - RGBHaO3

Equipment

Imaging Telescopes Or Lenses
Canon EF 200 f/2.8 L USM II
Filters
Astronomik 50mm Blu · Astronomik 50mm Gre · Astronomik 50mm Red · Astronomik 50mm 6nm OIII
Software
Pixinsight 1.8 · Sequence Generator Pro
Guiding Telescopes Or Lenses
Testar 30mm F4 Mini Guide Scope
Guiding Cameras
Starlight Xpress Lodestar X2

Acquisition details

Dates:
Aug. 28, 2021 ·  Oct. 8, 2021 ·  Oct. 24, 2021
Frames:
Astronomik 50mm 6nm Ha: 24x1200" (8h) (gain: 100.00) -10°C bin 1x1
Astronomik 50mm 6nm OIII: 21x1200" (7h) (gain: 100.00) -10°C bin 1x1
Astronomik 50mm Blu: 20x300" (1h 40') (gain: 0.00) -10°C bin 1x1
Astronomik 50mm Gre: 22x300" (1h 50') (gain: 0.00) -10°C bin 1x1
Astronomik 50mm Red: 23x300" (1h 55') (gain: 0.00) -10°C bin 1x1
Integration:
20h 25'
Darks:
25
Flats:
25
Flat darks:
25
Avg. Moon age:
13.69 days
Avg. Moon phase:
53.10%
Bortle Dark-Sky Scale:
3.00

Basic astrometry details

Astrometry.net job: 5256187

RA center: 00h57m44s.4

DEC center: -72°3907

Pixel scale: 3.962 arcsec/pixel

Orientation: 91.238 degrees

Field radius: 4.589 degrees

Resolution: 6096x5693

Locations: Glanmire Home Observatory, Bathurst, NSW, Australia

Data source: Backyard

Description

One of our closest galactic neighbors, the Small Magellanic SMC) cloud is a satellite galaxy of the Milky Way located approximately 200,000 light years from Earth. From my southerly location at latitude 33.5d south, the SMC is easily accessible this time of year providing plenty of imaging time when the skies are clear.

This wide field image captures the galaxy and its resident Ha and OIII regions along with a number of globular clusters in the same field of view. The globular NGC104 (47 Tucanae) at the top of the image is a little over 13,000 light years away and is a well visited object by visual observers and astro imagers alike.  The other prominent globular at the 8 o'clock position, NGC362, is about 28,000 light years away. There are many more smaller globulars lurking in the background along with at least one galaxy, NGC406 which is 64 million light years away.

My processing objective with this image was to try and include the Ha and OIII data along with the RGB information to produce an integrated image that presents the key chrominance information along with the narrowband emission lines. I did also capture SII data but it was not of sufficient prominence to make it worthwhile trying to integrate. This was my first attempt at incorporating the Ha and OIII data in this manner and resulted in much time sitting at the computer pondering the next move. Using Pixinsight I made use of established techniques to remove the emission line data from the broadband filter data to create specific masks that could then be used to blend in the Ha and OIII into the colour channels. In all, it was an interesting project.

Comments

Revisions

  • Small Magellanic Cloud - RGBHaO3, 



    
        

            Rodney Watters
    Original
  • Final
    Small Magellanic Cloud - RGBHaO3, 



    
        

            Rodney Watters
    B

B

Description: Repaired a few processing artefacts and some slight tweaks on colour.

Uploaded: ...

Sky plot

Sky plot

Histogram

Small Magellanic Cloud - RGBHaO3, 



    
        

            Rodney Watters