Contains: Triangulum galaxy, M 33, NGC 598
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The Nebulae of M33

Technical card

Imaging telescope or lens: Planewave CDK14

Imaging camera: SBIG STX 16803

Mount: Paramount ME II

Guiding telescope or lens: Planewave CDK14

Guiding camera: SBIG STX 16803

Software: CCDWare CCDAutoPilot 5CCDWare CCDStack 2Adobe Photoship CCPixInsight

Filter: Baader 50mm H7,O8,S8 and LRGB

Resolution: 4000x2926

Dates: Nov. 30, 2017

Frames: 104x900"

Integration: 26.0 hours

Avg. Moon age: 11.19 days

Avg. Moon phase: 86.25% job: 1874327

RA center: 23.458 degrees

DEC center: 30.665 degrees

Pixel scale: 0.728 arcsec/pixel

Orientation: 55.538 degrees

Field radius: 0.501 degrees

Locations: Sierra Remote Observatory, Auberry, California, United States


Being so close, M33 presents a nearly unique opportunity to image all of the nebulae of an entire galaxy in one shot. And some of them are so large they warrant an NGC number of their own!

This image started as an Ha capture to enhance my LRGB version of M33. But the size of the nebulae made me want to complete the image as a narrowband in bi-color. So I continued to shoot in OIII as well. 48 OIII and 56 Ha subs were used, each 900 sec. 26 hours in total.

Baader 6nm Ha and Astrodon 3nm OIII. Planewave CDK14 and SBIG STX 16803.



Kevin Morefield



Added a touch of unsharp masking

Sky plot

Sky plot


The Nebulae of M33, 


        Kevin Morefield