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The Rosette Nebula is a large emission nebula in Monoceros just to the west of the constellation of Orion more formally known as Sharpless 275. This object is often mistakenly called NGC 2244, however that designation applies just to the star cluster at its center. It can also be called NGC 2237 and 2238, the two numbers referring to different sections of the nebula. The loose open cluster in the upper left edge of the nebula is NGC 2252.
This is a narrowband image, rendered in Hubble colors, with H:O:S exposures of 4:1:2 hours.