Hemisphere:  Northern  ·  Contains:  NGC 6820  ·  NGC 6823
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Sh2-86, NGC 6820, NGC 6823, 


            Steven Bellavia
Sh2-86, NGC 6820, NGC 6823
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Sh2-86, NGC 6820, NGC 6823

Technical card

Imaging telescopes or lenses: Borg 90FL

Imaging cameras: ZWO ASI 183MM Pro

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding telescopes or lenses: Agena Astro 50mm f/3.9 Guidescope

Guiding cameras: ASI224MC

Focal reducers: Borg 0.72X Quadruplet Super Reducer, #7872

Software: IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Digital Photo Professional  ·  Annie's Astro Actions V7  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  SharpCap Pro 3.2  ·  PHD2 Guiding

Filters: Astronomik 6nm OIII  ·  Optolong 7nm Ha 2"

Dates:Sept. 26, 2019

Astronomik 6nm OIII: 17x360" (gain: 140.00) -15C bin 1x1
Optolong 7nm Ha 2": 10x300" (gain: 120.00) -15C bin 1x1

Integration: 2.5 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 26.89 days

Avg. Moon phase: 7.67%

Bortle Dark-Sky Scale: 3.00

Mean FWHM: 5.00

Temperature: 8.00

Basic astrometry details

Astrometry.net job: 2953211

RA center: 19h 43' 14"

DEC center: +23° 20' 38"

Pixel scale: 1.360 arcsec/pixel

Orientation: 180.430 degrees

Field radius: 1.018 degrees

Resolution: 4100x3500

Data source: Traveller


NGC 6820 is a small reflection 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
Open star cluster NGC 6823 is about 50 light years across and lies about 6000 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.



Steven Bellavia
License: None (All rights reserved)

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Sh2-86, NGC 6820, NGC 6823, 


            Steven Bellavia