Rosette Nebula

Designation: Sh2-275
Hemisphere: Northern
Constellation: Monoceros
Distance: 5,200 light years
Object type: Emission nebula


Sh2-275 is a large region of interstellar gas, mostly ionized hydrogen, whose shape resembles that of a rosette, hence the informal name Rosette Nebula; located approx. 5,000 light years from Earth in the constellation Monoceros, the Unicorn, the nebula stretches about 130 light years across.

This is a star-forming region containing roughly 2,500 young stars, according to latest estimations. At the core of the Rosette Nebula is the open cluster NGC 2244, which is closely associated with the nebulosity, and is an example of stars formed from the nebula’s gas and dust.

Super hot stars (O-stars) within C 49 produce radiation and stellar winds that contribute to shape the nebula by excavating the layers of dust and gas away in its core.


Mount: ZWO AM5
Main Telescope: William Optics RedCat 51
Main camera: ZWO ASI294MC-Pro
Main camera filter: Optolong L-Ultimate 3nm
Guidescope: William Optics uniguide 32
Guide camera: ZWO ASI220MM Mini
Main camera filter: Astronomiik UV/IR Cut

Acquisition details

Total integration time: 7 hours 15 minutes
Acquisition: ZWO AsiAir Plus
Processing: PixInsight
Location: Luxembourg

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