Contains: IC 1275, NGC 6559, IC 1274, IC 4685, IC 4684, NGC 6544, NGC 6546, NGC 6530, M 21, NGC 6531, 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

Image of the day 06/11/2016

Getting plate-solving status, please wait...

Sunflowers - M8,M20 & NGC 6334 in Narrowband

Technical card

Resolution: 2344x3121

Dates: June 3, 2016

Frames: 60x1200"

Integration: 20.0 hours

Avg. Moon age: 27.67 days

Avg. Moon phase: 3.87%

Astrometry.net job: 1109244

RA center: 271.295 degrees

DEC center: -23.790 degrees

Pixel scale: 3.280 arcsec/pixel

Orientation: -41.765 degrees

Field radius: 1.779 degrees

Locations: Burwood, Melbourne, Victoria, Australia

Description

Inspired by Van Gogh's famous still life painting - "Sunflowers" and an APOD from 2007 here we have the Sagittarius triplet in glorious narrowband, taken from my light polluted suburban backyard in Melbourne, Australia.

Approximately 20 hrs exposure in all in 20min subs. 7 Hrs Ha, & 8 hrs S2 and 5 hrs O3 (All 5nm Astrodon filters) with RGB stars, 15 x 1min R,G&B.

Very tricky to process with the brightness range being extreme over these three objects. The M8 core and M20 are insanely bright, and NGC 6334 is very dim. Also the surrounding area is rich in Ha and S2 so they needed to be toned down to emphasise the "flower vase" structure. I wanted to "respect the light" but I had to compensate by dimming down certain areas for an overall pleasing aesthetic effect.

Havn't seen too many Sagittarius triplets with this NB treatment and composition, so I hope you like it and thanks for looking!

UPDATE: Image chosen as NASA APOD June 24th, 2016

Comments

Author

Andy
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Revisions

B

Core detail sharpened - minor colour mapping revisions

Sky plot

Sky plot

Histogram

Sunflowers - M8,M20 & NGC 6334 in Narrowband, 




    

        Andy