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NGC 2244, NGC 2237-9, 46
Object Type: Open cluster, Emission nebula
Constellation: Monoceros
Magnitude: 4.8
Size: 80' x 60'

The Rosette Nebula is a large emission nebula surrounding the open cluster NCG 2244. When viewed with an O-III or narrowband filter, it is an impressive object in small telescopes.

Instrument: ST-10XME/Nikkor 300mm f/4 lens
F-ratio: f/5.6
Exposures: RRGB: R 7 x 12 minutes, binned 1x1: G 8 x 3 minutes, binned 2x2: B 8 x 3 minutes, binned 2x2
Date: February 5, 2005
Location: Landers, California, USA
Technical Notes: Exposures were sigma combined, and the RGB image assembled in Registar 1.0. A Gaussian Blur of 1 pixel was applied to the RGB image and the dim portions of the luminance image. A high-pass filter of 4 pixels was selectively applied to the bright portions of the luminance image. The RGB image was duplicated and combined with the original using Soft Light to enhance color.