Hemisphere:  Southern  ·  Contains:  Hourglass nebula  ·  IC 1274  ·  IC 1275  ·  IC 4684  ·  IC 4685  ·  Lagoon nebula  ·  M 20  ·  M 8  ·  NGC 6514  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6544  ·  NGC 6546  ·  NGC 6559  ·  The star 11Sgr  ·  The star 7Sgr  ·  The star 9Sgr  ·  Trifid nebula
Lagoon and Trifid stars and starless, 


            John Gleason
Lagoon and Trifid stars and starless
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Lagoon and Trifid stars and starless

Technical card

Imaging telescopes or lenses: Astro-Physics 155mm f7 StarFire EDF @ f/5.5

Imaging cameras: FLI PL16803

Mounts: Paramount ME

Software: MaximDL 5

Dates:Oct. 1, 2019

Frames: 30x600"

Integration: 5.0 hours

Avg. Moon age: 3.11 days

Avg. Moon phase: 10.57%

Basic astrometry details

Astrometry.net job: 2996449

RA center: 18h 11' 25"

DEC center: -23° 49' 37"

Pixel scale: 9.790 arcsec/pixel

Orientation: 0.488 degrees

Field radius: 2.740 degrees

Resolution: 1800x906

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Stars vs. Starless. Starnet++ software has enabled imagers to explore deep images without the eye interference of foreground stars. The result is a revealing landscape of subtle structures normally lost to the eye. It comes at a cost however with artifacts as a result of the replaced stars, especially in an extremely star-rich field such as this one. Starnet++ results can be used as a separate layer to enhance faint structures while preserving star intensity. Image on the right is HRGB, combined with starless layer.



John Gleason
License: None (All rights reserved)

Sky plot

Sky plot


Lagoon and Trifid stars and starless, 


            John Gleason