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





    
        

            Etienne MARQUET
M20-21

M20-21

Technical card

Imaging telescope or lens:Sky-Watcher 254 Newtonian Astrograph

Imaging camera:SONY Alpha A7S

Mount:Sky-Watcher NEQ6

Guiding telescope or lens:CELESTRON Guidescope 80mm

Guiding camera:INOVA PLB-Mx2

Software:Pléïades Astrophoto PixInsight

Resolution: 3960x2506

Dates:Sept. 7, 2015

Frames: 43x30" ISO3200 bin 1x1

Integration: 0.4 hours

Darks: ~25

Flats: ~15

Bias: ~50

Avg. Moon age: 24.21 days

Avg. Moon phase: 28.77%

Bortle Dark-Sky Scale: 3.00

Temperature: 22.00

Astrometry.net job: 777788

RA center: 270.732 degrees

DEC center: -22.817 degrees

Pixel scale: 1.446 arcsec/pixel

Orientation: -136.021 degrees

Field radius: 0.941 degrees

Description

M20-21 Constellation du Sagittaire

Comments

Author

Etienne60
Etienne MARQUET
License: None (All rights reserved)
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M20-21, 





    
        

            Etienne MARQUET