Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  NGC 6818  ·  PK025-17.1
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NGC 6818, Gary Imm
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NGC 6818

Getting plate-solving status, please wait...
NGC 6818, Gary Imm
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NGC 6818

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Description

This object is a tiny but bright planetary nebula located 5000 light years away in the constellation of Sagittarius at a declination of -14 degrees. The nebula spans about 25 arc-seconds in our apparent view, which corresponds to a diameter of about 0.5 light years.

This object doesn't really look like any other PN that I have imaged. Comparing it to the Hubble image, the general structure is similar so I don't think the unique structure is due to any artifacts from my imaging/processing. The nebula is primarily cyan indicating dominant OIII gas outflow, with a slightly reddish interior region indicating the presence of HII. White arcing gas fronts are seen in the interior. A central star looks faintly visible but it is hard to tell for sure.

This object has the nickname of the Little Gem Nebula and I can see its resemblance to a tiny gemstone.

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