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Contains:  Triangulum galaxy, M 33, NGC 598
Getting plate-solving status, please wait...
M33 LRGB with 26 hours of OIII and Ha, 


            Kevin Morefield
M33 LRGB with 26 hours of OIII and Ha

M33 LRGB with 26 hours of OIII and Ha

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:Adobe Photoship CCCCDWare CCDAutoPilot 5CCDWare CCDStack 2

Resolution: 4009x3138

Dates:Nov. 12, 2017

Frames: 365x475"

Integration: 48.2 hours

Avg. Moon age: 23.82 days

Avg. Moon phase: 32.63% job: 1877445

RA center: 23.449 degrees

DEC center: 30.666 degrees

Pixel scale: 0.728 arcsec/pixel

Orientation: 55.548 degrees

Field radius: 0.515 degrees

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

Data source: Own remote observatory

Remote source: Sierra Remote Observatories


I find the OIII rich nebulae to be the most interesting thing here. I wonder how many other galaxies would benefit by OIII data?

This image is an odd amalgamation of data from the 2016 and 2017 seasons. In 2016 I had shot quite a bit of LRGB binned 2x2 and unguided due to some guide camera issues. I added more bin 1x1 guided RGB data in November. All of the LRGB data is 300 seconds. I then started shooting Ha. Since I thought of the Ha only enhancing red color data I shot that bin 2x2 at 900 seconds. Seeing so much nebula structure I thought some OIII could help and added OIII 2x2 at 900 seconds. (see my other narrowband only post on this)

I now have 260 LRGB subs and 105 Narrowband subs with a total integration time of 46 hours. Non of the Luminance is 1x1 binned! So I guess next year I work on that....

The brightest nebulae are on the edge of saturated in Ha. I guess that's for next year too.

The Ha and OIII were added as layers in PS with a lighten blending. Ha was colored Magenta and OIII blue.



Kevin Morefield
License: None (All rights reserved)

Sky plot

Sky plot


M33 LRGB with 26 hours of OIII and Ha, 


            Kevin Morefield