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Contains:  NGC 6818
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NGC 6818, 



    
        

            Gary Imm
NGC 6818
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NGC 6818

Technical card


Dates:Oct. 12, 2019

Frames:
Astrodon Blue 31mm Gen2 I-Series: 40x60" (gain: 111.00) -12C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 40x60" (gain: 111.00) -13C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 40x60" (gain: 111.00) -12C bin 1x1

Integration: 2.0 hours

Avg. Moon age: 13.51 days

Avg. Moon phase: 98.22%


Basic astrometry details

Astrometry.net job: 2987811

RA center: 19h 43' 57"

DEC center: -14° 9' 10"

Pixel scale: 0.247 arcsec/pixel

Orientation: 194.574 degrees

Field radius: 0.161 degrees


Resolution: 3882x2645

Locations: Backyard (Mag 20.8 - New Moon), Onalaska, Texas, United States

Data source: Backyard

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.

Comments

Author

GaryI
Gary Imm
License: None (All rights reserved)
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NGC 6818, 



    
        

            Gary Imm