M8 and M20 in HαHßHß - RGB stars (Uwe Deutermann)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: 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 · Sh2-25 · Sh2-28 · Sh2-30 · The star 7Sgr · The star 9Sgr · Trifid Nebula

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M8 and M20 in HαHßHß - RGB stars

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M8 and M20 in HαHßHß - RGB stars

I did not come back to my Hydrogen Beta filter for a long time, but I remembered that M20 was one of the nebula for which Hß was a good choice. Hence I tried it out with the "extra" M8 on top of it. And with the (first) neighboring tree down I got some more time together for this area in the sky. One thing for sure, the Hß filter did very well, Version B shows the Hß version alone after some processing, I do not believe that an OIII filter would have done much better (will try that out as soon as the weather lets me!). And with all the problems that I had with the OIII filter this might be at least for some objects a very good alternative, since with this dataset there were no major problems.

Additional names for M20: NGC 6514, Sh2-30, RCW 147, Gum 76

Additional names for M8: Sh2-25, RCW 146, Gum 72

M8 contains: NGC 6523, NGC 6530, Hourglass nebula

B

Description: The Hydrogen Beta channel alone.

Uploaded: ...

C

Description: Hα starless version.

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D

Description: Hß starless version

Uploaded: ...

E

Description: Used the starless version and the RGB stars to combine image in multiple stages, blending out gradually bright stars.

Uploaded: ...

F

Description: Further slight star reduction.

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Status	Advanced success
Started	...
Astrometry.net job	3638150
PixInsight job	DT3UCR421Y8F3NLDGBSCEKOLCU0F1T5U
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	18h03m58s.23
RA (top/left)	18h07m47s.12
RA (top/right)	18h07m39s.94
RA (bottom/right)	18h00m13s.29
RA (bottom/left)	18h00m12s.63

Dec (center)	-23°42′43″.9
Dec (top/left)	-24°55′43″.8
Dec (top/right)	-22°28′46″.1
Dec (bottom/right)	-22°29′14″.3
Dec (bottom/left)	-24°56′12″.7

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M8 and M20 in HαHßHß - RGB stars

M8 and M20 in HαHßHß - RGB stars

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Image Index:

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M8 and M20 in HαHßHß - RGB stars

M8 and M20 in HαHßHß - RGB stars

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D

E

F

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