Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 6818
Getting plate-solving status, please wait...
NGC 6818, 


            Gary Imm
NGC 6818
Powered byPixInsight

NGC 6818

Technical card

Dates:Oct. 12, 2019

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 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


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.



Gary Imm
License: None (All rights reserved)

Sky plot

Sky plot


NGC 6818, 


            Gary Imm