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Contains:  NGC 6544, NGC 6546, NGC 6530, M 8, Lagoon nebula, Hourglass nebula, NGC 6523, NGC 6526, Trifid nebula, M 20, NGC 6514, The star 9Sgr, The star 7Sgr, The star 4Sgr
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M8 (Lagoon) and M20 (Trifid) Nebulae in wide field, 


            Barry Brook
M8 (Lagoon) and M20 (Trifid) Nebulae in wide field

M8 (Lagoon) and M20 (Trifid) Nebulae in wide field

Technical card

Resolution: 2268x1500

Dates:Aug. 2, 2014

50x30" ISO800
25x300" ISO800

Integration: 2.5 hours

Darks: ~25

Flats: ~100

Bias: ~100

Avg. Moon age: 5.93 days

Avg. Moon phase: 34.76%

Bortle Dark-Sky Scale: 6.00

Mean FWHM: 1.85

Temperature: 3.00 job: 343909

RA center: 270.921 degrees

DEC center: -24.262 degrees

Pixel scale: 5.505 arcsec/pixel

Orientation: -89.089 degrees

Field radius: 2.079 degrees


A famous region towards the heart of the galaxy, captured in wide field (about 3.5 x 2.3 degrees). The Lagoon Nebula (M8 or NGC 6523) is a vast cloud of interstellar gas in the constellation Sagittarius (55 x 20 light years across). To the lower right is the Trifid Nebula (M20 or NGC 6541), another colourful HII region. They are located 4,100 to 5,200 light years from Earth.

This astro-image was captured in urban (Bortle 6 skies), and created as a layered blend of 25 x 5 min and 55 x 30 sec subs, for a total integration of 2.5 hours.

Captured and pre-processed with flats (light box), bad pixel map and bias in Nebulosity. Post-processed in StarTools.



Barry Brook
License: Attribution Creative Commons

Sky plot

Sky plot


M8 (Lagoon) and M20 (Trifid) Nebulae in wide field, 


            Barry Brook