Sharpless 2-112 - The "Clown Face Nebula"

Emission/Dark Nebula in Cygnus

Uploaded 11/8/05

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 There are two nebulas in the sky with the word "Clown" in the name, can you guess the other object? (Ill tell you at the very bottom of this page). This wondrous object challenges astrophotographers because of its extreme faintness, and exciting detail. Located on the opposite side of Deneb from the North American Nebula, it lies in a very dense star field in the Cygnus Milkyway. With a total extent approaching half a degree in size, this extended object contains a rich assortment of dark lanes, bright wreaths, and is surrounded by a very dim blue glow from reflection nebulosity seen best on the lower left frame. I was not surprised to see the faint arcs and extensions from such an object but the blue areas were a nice touch.

Processing Notes:

This image is a 50 percent mix of hydrogen alpha filtered images and red light images for the luminance. Similarly, the red channel in the RGB is a mix as well, with two combines - one 80 percent mix of Ha data, and then remixed with the original red data using lighten to keep all the bright stars the correct colors. Photoshop was then used to rotate the entire hue spectrum of the image about two degrees to exactly match the pinkish red hue of the original G2V calibrated RGB image. (More on this new technique later).

Instrument: 12.5" f/5 Home made Newtonian Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Cooling Guider: SBIG ST4 Exposure: L+Ha(R+HaGB) = 120:80:20:20 (RGB Binned 2x2) RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 9.5 arcsec (Maxim DL - 10min subframe), Transparency 8/10 Outside Temperature: 45 F CCD Temperature: -30 C Processing Tools: Maxim DL, Photoshop, PixInsight HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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The "other" celestial clown is NGC2392, known better as the "Eskimo Nebula" is also known as the "Clown nebula"