Hemisphere:  Southern  ·  Contains:  M 17  ·  NGC 6618  ·  Omega nebula
M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data  = REV.3=, 



    
        

            Fernando
M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data  = REV.3=
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M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data = REV.3=

Technical card

Imaging telescopes or lenses: Skywatcher Esprit 120mm f/7

Imaging cameras: SBIG ST8300M

Mounts: Sky-Watcher NEQ-6 Goto

Guiding cameras: Starlight-XPress Loadstar guider

Software: PixInsight

Filters: Astronomik LRGB 36mm

Accessory: SBIG OAG-8300  ·  SBIG Filter Wheel FW8-8300


Dates:July 29, 2015

Frames: 21x1200"

Integration: 7.0 hours

Avg. Moon age: 12.61 days

Avg. Moon phase: 94.84%


Basic astrometry details

Astrometry.net job: 1232644

RA center: 18h 21' 1"

DEC center: -16° 12' 21"

Pixel scale: 1.302 arcsec/pixel

Orientation: -40.739 degrees

Field radius: 0.760 degrees


Resolution: 3352x2532

Locations: Lily's Flower Observatory, Santa Rita do Sapucai, Minas Gerais, Brazil

Description

M 17 is distant 17 thousands light years from us and shines thanks to an embedded open cluster formed by about 35 stars made by material of the nebula.
This view used narrow band data do get synthetic RGB, according the following equations:
red=0.33*S2+1*Ha
green=1*O3
Blue=0.33*Ha+1*O3
L=red+green+blue
The stackup for this image is:
Ha, S2 and O3: 7x20m for each channel
Bias, darks and Flats applied.
Pre-Processing and Post-Processing in PixInsight

=REV.2=
This new revision uses the same color's palette but a different color balance to get a more realistic RGB colors.

=REV.3=
This release has the following updates:
Multiresolution sharpening
Increase in the contrast
Better routine of de-noise applied

Comments

Author

nandopg
Fernando
License: None (All rights reserved)
3852
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Revisions

  • M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data  = REV.3=, 



    
        

            Fernando
    Original
  • M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data  = REV.3=, 



    
        

            Fernando
    B
  • Final
    M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data  = REV.3=, 



    
        

            Fernando
    C

Sky plot

Sky plot

Histogram

M 17 in Sagittarius: A View in LRGB Synthesized Form Narrow Band Data  = REV.3=, 



    
        

            Fernando