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

Technical card

Resolution: 4528x3840

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

Integration: 70.2 hours job: 1489712

RA center: 23.446 degrees

DEC center: 30.626 degrees

Pixel scale: 1.078 arcsec/pixel

Orientation: -179.978 degrees

Field radius: 0.889 degrees

Locations: The Hills Observatory, Manchester, United Kingdom


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



Added frame and details

Sky plot

Sky plot


M33 in RGB,Ha,OIII & SII, 


        Mike Oates