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Contains:  Hourglass nebula, Lagoon nebula, M 8, NGC 6523, NGC 6526, NGC 6530, The star 7Sgr, The star 9Sgr
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Sunset at the Lagoon, 


            John Willis
Sunset at the Lagoon
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Sunset at the Lagoon

Technical card

Imaging telescope or lens:Takahashi FSQ106ED

Imaging camera:ZWO ASI1600MM-Cool

Mount:iOptron CEM 60

Guiding telescope or lens:PrimaLuceLab 60mm CompactGuide scope

Guiding camera:QHYCCD 5L-II M

Software:Seqence Generator ProPixInsight

Filters:ZWO SII 31mm 7nmZWO Ha 7nmZWO Oiii 31mm

Dates:Aug. 22, 2019

Frames: 115x120"

Integration: 3.8 hours

Avg. Moon age: 21.08 days

Avg. Moon phase: 61.31%

Basic astrometry details job: 2890569

RA center: 18h 3' 54"

DEC center: -24° 16' 40"

Pixel scale: 1.474 arcsec/pixel

Orientation: 0.374 degrees

Field radius: 1.133 degrees

Resolution: 4410x3348

Locations: Backyard, Plano, Texas, United States

Data source: Backyard


When I put together my first narrowband image of the Lagoon Nebula, I wanted to do something different than the standard or modified Hubble palette. After experimenting a bit, I really liked this result. This is mapping Oiii to Red, Ha to Green ans Sii to Blue (OHS). After that a little color masking to modify the Cyan edges of the nebula and averaging Green down by about 25%.

The difference in depth that the yellows oranges and reds provided over the more traditional green or blue cores was striking, and definitely felt like a new look at an often shot target.



John Willis
License: Attribution-NonCommercial Creative Commons

Sky plot

Sky plot


Sunset at the Lagoon, 


            John Willis