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Contains:  M 20, M 21, NGC 6514, NGC 6531, Trifid nebula
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M20 and M21

Technical card

Dates:July 10, 2019

Frames: 138x600"

Integration: 23.0 hours

Avg. Moon age: 8.48 days

Avg. Moon phase: 61.61%

Basic astrometry details job: 3041227

RA center: 18h 3' 1"

DEC center: -22° 51' 28"

Pixel scale: 0.963 arcsec/pixel

Orientation: 359.728 degrees

Field radius: 0.716 degrees

Resolution: 3731x3838

Data source: Amateur hosting facility

Remote source: ChileScope


Telescope/lens: ASA 20" f/3.8 Corrected Newtonian Astrograph
Camera: FLI Proline 16803 CCD Camera
Exposure and filters: HaLRGB 23 hours total exposure
Mount: DDM85 PRO
Location: Chilescope observatory, Chile



Stanislav Volskiy

Sky plot

Sky plot


M20 and M21, 


            Stanislav Volskiy