Hemisphere:  Northern  ·  Contains:  M 33  ·  NGC 598  ·  Triangulum galaxy
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M33 in RGB,Ha,OIII & SII, 


            Mike Oates
M33 in RGB,Ha,OIII & SII
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M33 in RGB,Ha,OIII & SII

Technical card

Imaging telescopes or lenses: Takahashi FSQ-106 ED

Imaging cameras: Starlight Xpress SX-814 Trius Monochrome CCD

Mounts: Sky-Watcher EZ-EQ6 GT

Guiding cameras: Starlight-XPress Lodestar Autoguider

Software: Sequence Generator Pro  ·  Photoshop CS6  ·  PIXINSIGHT 1.8

Filters: Astrodon 3nm SII  ·  Astrodon 3nm OIII  ·  Ha 3nm  ·  Red  ·  Green  ·  Blue

Accessory: Lakeside Astro Motor Focus System  ·  Starlight Xpress SX 'Maxi wheel'  ·  Starlight Instruments FTF3545B-A Focuser

Astrodon 3nm OIII: 42x1700"
Astrodon 3nm SII: 29x2007"
Blue: 44x586" bin 1x1
Green: 47x600" bin 1x1
Ha 3nm: 45x907" bin 1x1
Red: 51x553" bin 1x1

Integration: 70.2 hours

Basic astrometry details

Astrometry.net job: 1489712

RA center: 1h 33' 47"

DEC center: +30° 37' 33"

Pixel scale: 1.078 arcsec/pixel

Orientation: 359.978 degrees

Field radius: 0.889 degrees

Resolution: 4528x3840

Locations: The Hills Observatory, Manchester, United Kingdom

Data source: Backyard


An image I would never have thought possible from my light polluted Manchester UK garden. I also included OIII & SII data to see this galaxy in a different light to those normally seen.

I have given the average sub exposure times above as they varied a bit. The average SQM-L for the whole 2 year period was 18.6 and never got better than 18.98 which is very rare. So I hope this gives some inspiration to those who image from poor sites to give it a go.



Mike Oates
License: None (All rights reserved)


  • M33 in RGB,Ha,OIII & SII, 


            Mike Oates
  • Final
    M33 in RGB,Ha,OIII & SII, 


            Mike Oates


Description: Added frame and details

Sky plot

Sky plot


M33 in RGB,Ha,OIII & SII, 


            Mike Oates