NGC 6820 is a small emission nebula near the open cluster NGC 6823 in Vulpecula. The reflection nebula and cluster are embedded in a large faint emission nebula called Sh 2-86. The whole area of nebulosity is often referred to as NGC 6820.
M27, the Dumbbell Nebula, is found three degrees to the east, and α Vulpeculae three degrees to the west.
Open star cluster NGC 6823 is about 50 light-years across and lies about 6,000 light-years away. The center of the cluster formed about two million years ago and is dominated in brightness by a host of bright young blue stars. Outer parts of the cluster contain even younger stars. It forms the core of the Vulpecula OB1 stellar association.
Object Designations: NGC 6820 and NGC 6823
Also known as: N/A
Constellation: Vulpecula
Object Type: emission nebula and open cluster
Distance: 6000 light-years away
Magnitude: 10.6
Discovery: William Herschel 1785
This final image is:
76 – 4 minute subs at 100 gain – no filter over 5 hours of integration
I processed the images using Pixinsight using:
Blink to clear out low quality images
Weighted Batch Balance
SpectroPhotometricCalibration
AutomaticBackgroundExtractor
BlurExterminator
NoiseExterminator
EZProcessing Suite Softstretch (img version 1)
GeneralizedHyperbolicStrectch (img version 2)
ColorCalibration on both versions
StarXTerminator
Curves on both versions using other version as mask
Pixmath to put stars back with both images.
