Celestial hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  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=

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=
Powered byPixInsight

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

Equipment

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Acquisition details

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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

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