Hemisphere:  Northern  ·  Constellation: Monoceros (Mon)  ·  Contains:  IC 448  ·  NGC 2236  ·  NGC 2239  ·  NGC 2244  ·  NGC 2252  ·  Rosette nebula  ·  The star 12Mon  ·  The star 13Mon
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Rosette Nebula in Ha (RedCat 51), 


            Trevor Jones
Rosette Nebula in Ha (RedCat 51)
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Rosette Nebula in Ha (RedCat 51)

Technical card

Imaging telescopes or lenses: William Optics RedCat 51 APO

Imaging cameras: Canon T3i

Mounts: iOptron SkyGuider Pro

Software: photoshop cc  ·  DeepSkyStacker (DSS) Deepskystacker 3.3.6

Filters: Optolong 7nm Ha 2"

Dates:Feb. 18, 2019

Frames: 33x240"

Integration: 2.2 hours

Avg. Moon age: 13.42 days

Avg. Moon phase: 97.95%

Basic astrometry details

Astrometry.net job: 2537544

RA center: 6h 31' 52"

DEC center: +5° 2' 16"

Pixel scale: 5.116 arcsec/pixel

Orientation: 256.949 degrees

Field radius: 2.898 degrees

Resolution: 1824x1320

Locations: My Backyard, St. Catharines, Ontario, Canada

Data source: Backyard


Here is a relatively short integration of the Rosette Nebula in Ha using the William Optics RedCat 51. The 'Cat tracked the night sky riding on an iOptron SkyGuider Pro, without the use of autoguiding. Dithering would have really helped, but it was just nice to get out and shoot again after a long hiatus.

Very impressed with the RedCat thus far. Extremely wide and sharp images when used with a crop-sensor DSLR like my old Canon EOS Rebel T3i. More info: https://astrobackyard.com/william-optics-redcat-51/