CCD Images of The Sharpless7 Catalog

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Sharpless	Instrument	Exposure	Camera	Filters
SH2-203	Epsilon 180 F/2.8	5 Hours 30 Minutes	ST-10 XME	H-Alpha, RGB

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Sharpless	Instrument	Exposure	Camera	Filters
SH2-203	Epsilon 180 F/2.8	5 Hours 30 Minutes	ST-10 XME	H-Alpha, RGB

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Sharpless	Instrument	Exposure	Camera	Filters
SH2-203	Epsilon 180 F/2.8	4 Hours	ST-10 XME	H-Alpha

Sharpless	SH2-203
Common Name	Sharpless 203
Constellation	Perseus
RA	3h 18m
DEC	54d 41m
Size	45
Shape	Circular
Brightness	Faint
Object Type	Diffuse Nebula
Type	Emission
Other Catalog #	None

This dim loose object is found in northern Perseus and is a good object for a field of view around two degrees. The nebula is fairly dim and needs a lot of exposure time to bring out the contrast. The hydrogen-alpha filter seems to work best with this object as I did not pick up much RGB in the color exposures. So blending the H-Alpha channel and the red and blue seem to help. You will want to preserve the small reflection nebula seen in this image by doing a composite in Photoshop. A larger telescope with about the same field of view may pick up some the finer structure in the nebula, but longer F-ratio systems will need long exposures.

Web page for SH2-203

More information from Galaxy Map Web site