M20 (Trifid Nebula) (Ben Hayes)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · HD164384 · HD164402 · HD164492 · HD164514 · HD164637 · HD164704 · HD164833 · LBN 27 · M 20 · NGC 6514 · Sh2-30 · Trifid Nebula

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M20 (Trifid Nebula)

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M20 (Trifid Nebula)

Classified as NGC6514 in the New General Catalog. Several weeks earlier, during a full moon, I collected over 3 hours of Ha and Oiii data using an Optolong L-Extreme filter, but had to toss most of the sub-frames because of clouds or airplanes. The remaining 18 dual-narrowband frames (300s each) were very good, but provided only 1½ hours of integration time. The resulting narrowband image had so much more noise than the broadband image, that combining the two data sets only made it worse.

In summary, this is the broadband-only version, with only 3¾ hours integration time, taken under Bortle 4 skies, under above transparency and seeing conditions, a waning crescent moon (28% illumination) and a mean Sky Quality Reading (SQM) of 20.71 mag/arcsec2.

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Description: Same as original (Revision A), except with out the acquisition details.

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Status	Advanced success
Started	...
Astrometry.net job	8556227
PixInsight job	A1W5YCLH1A35MZ0RDNROS9Z82JRBEXLW
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m26s.321
RA (top/left)	18h02m15s.384
RA (top/right)	18h00m51s.110
RA (bottom/right)	18h02m37s.446
RA (bottom/left)	18h04m01s.697

Dec (center)	-23°00′44″.86
Dec (top/left)	-22°36′18″.67
Dec (top/right)	-23°11′43″.27
Dec (bottom/right)	-23°25′09″.76
Dec (bottom/left)	-22°49′40″.96

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M20 (Trifid Nebula)

M20 (Trifid Nebula)

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M20 (Trifid Nebula)

M20 (Trifid Nebula)

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