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Contains:  NGC 2252, NGC 2244, Rosette nebula, NGC 2239, The star 12Mon
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4 Panel Rosette Mosaic - Caldwell 49

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:QHYCCD QHY174

Software:CCDWare CCDStack 2Adobe Photoship CCCCDWare CCDAutoPilot 5

Filters:Astrodon OIII 3 nmAstrodon Ha 5 nmAstrodon SII 3 nm

Resolution: 7095x6665

Dates:Feb. 18, 2019

Astrodon Ha 5 nm: 79x1200" -30C bin 1x1
Astrodon OIII 3 nm: 66x1200" -30C bin 1x1
Astrodon SII 3 nm: 76x1200" -30C bin 1x1

Integration: 73.7 hours

Darks: ~20

Flats: ~20

Bias: ~20

Avg. Moon age: 13.42 days

Avg. Moon phase: 97.95%

Bortle Dark-Sky Scale: 3.00 job: 2535865

RA center: 98.015 degrees

DEC center: 4.933 degrees

Pixel scale: 0.726 arcsec/pixel

Orientation: 159.931 degrees

Field radius: 0.981 degrees

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

Data source: Own remote observatory

Remote source: Sierra Remote Observatories


Encompassing five NGC objects, NGCs 2237, 2238, 2239, 2244, 2246, the Rosette is one of my top 5 favorite objects. But shooting at 2563mm I was forced to use a four panel mosaic. The mosaic was stitched using the PS CC automate photomerge command. Pre-processing was in CCDStack to produce the four panel masters that were finished fully in PS CC.

221 twenty minute subs for a total of 73.7 hours. 79 Ha, 66 OIII, 76 SII. I would like to have added more time in some of the panels but the season is coming to a close and roof open time is fleeting this Winter.

The color mix is straight SHO. I may try some alternate mixes down the road.



Kevin Morefield

Sky plot

Sky plot


4 Panel Rosette Mosaic - Caldwell 49, 


            Kevin Morefield

In these public groups

Deep Sky Mosaics
Narrowband imaging