M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars (Uwe Deutermann)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: 4 Sgr · 7 Sgr · 9 Sgr · B296 · B85 · B88 · B89 · Lagoon Nebula · M 20 · M 21 · M 8 · NGC 6514 · NGC 6523 · NGC 6526 · NGC 6530 · NGC 6531 · NGC 6546 · PK006+00.1 · Sh2-25 · Sh2-28 · Sh2-30 · The star 4Sgr · The star 7Sgr · The star 9Sgr · Trifid Nebula

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M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars

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M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars

I collected additional OIII data and thought that it might be interesting to get a false color image of the 3 channels Hα. OIII and Hß together. In addition to the nice colors using this combination I found it very interesting to see where OIII is more dominant than the Hß. Mainly in the heart of M8 and M20 OIII pops out, while the "second" nebula part of M20 is mostly dominated by the Hß channel. I added RGB stars to the narrow band images obtained over several nights, lowering the gain of the ASI071MC to 90, and the offset to 10.

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Description: The image with added RGB stars and some minor improvements.

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ZWO ASI1600MM/QHY163M
AstroBin Platform open discussions community forum
Florida / Georgia Imagers
Narrowband imaging
Sharpless2 Objects
Celestron RASA

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Status	Advanced success
Started	...
Astrometry.net job	3649579
PixInsight job	L3FX99PJT096PK4SKZPVYE05F5OJ3G49
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h03m49s.97
RA (top/left)	18h07m54s.31
RA (top/right)	18h08m01s.18
RA (bottom/right)	17h59m50s.70
RA (bottom/left)	17h59m34s.40

Dec (center)	-23°43′11″.9
Dec (top/left)	-24°59′19″.1
Dec (top/right)	-22°28′37″.1
Dec (bottom/right)	-22°26′39″.3
Dec (bottom/left)	-24°57′17″.1

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M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars

M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars

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M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars

M8 and M20 (and a piece of M21) in Hα OIII Hß, added RGB stars

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