Hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  12 Mon  ·  NGC 2237  ·  NGC 2238  ·  NGC 2239  ·  NGC 2244  ·  NGC 2246  ·  Rosette nebula  ·  Sh2-275  ·  The star 12Mon
Getting plate-solving status, please wait...
Rosette Nebula (NGC-2237), 


            Joel Shepherd
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Rosette Nebula (NGC-2237)

Getting plate-solving status, please wait...
Rosette Nebula (NGC-2237), 


            Joel Shepherd
Powered byPixInsight

Rosette Nebula (NGC-2237)

Imaging telescopes or lenses: Skywatcher Esprit 80ED APO Triplet

Imaging cameras: Atik 460EX Mono

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion Deluxe Mini 50mm Guide Scope with Helical Focuser

Guiding cameras: Lodestar X2

Software: PixInsight 1.8  ·  Craig Stark Nebulosity 3

Filters: Astrodon 5nm H-alpha  ·  Astrodon 3nm OIII 1.25

Accessory: Skywatcher Field Flattener for Esprit 80

Dates:Dec. 20, 2017Dec. 23, 2017

Astrodon 3nm OIII 1.25: 18x600" (3h) -20C bin 1x1
Astrodon 5nm H-alpha: 16x600" (2h 40') -20C bin 1x1

Integration: 5h 40'

Avg. Moon age: 3.32 days

Avg. Moon phase: 13.54%

Bortle Dark-Sky Scale: 6.00

RA center: 06h32m03s.209

DEC center: +04°5701.11

Pixel scale: 3.530 arcsec/pixel

Orientation: -125.978 degrees

Field radius: 1.023 degrees

More info:Open 

Resolution: 1600x1338

Locations: Home, Seattle, WA, United States

Data source: Backyard


Subject: The Rosette Nebula (NGC-2237), an emission nebula in Monoceros, approximately 130 light-years across and 5000 light-years distant. X-ray imaging has revealed around 2500 young stars forming in the nebula's gasses and molecular clouds.

Capture notes: In what must be a first, Seattle had clear skies, a new moon and steady air on the night of the winter solstice. It was magical. Used the 3nm O-iii filter for the first time that night and am pleased with the results (versus the 5nm). A few nights later when I captured the Ha, it started clear but as the night progressed, thin high clouds started forming and thickening. I was still getting signal when I called it, but not much. Am happy the Ha turned out as well as it did.

Processing: Tonemapping of the Ha and O-iii stacks, luminance from the Ha stack with the O-iii tone map added in. Palette is basically HOO, but I boosted the Ha and O-iii data a bit for the red and blue channels, and the green has a little bit (20%) of Ha in the mix.


Sky plot

Sky plot


Rosette Nebula (NGC-2237), 


            Joel Shepherd

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Narrowband imaging