M20 The Trifid Nebula (Steve Argereow)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: B85 · LBN 27 · M 20 · NGC 6514 · Sh2-30 · Trifid Nebula

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M20 The Trifid Nebula

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M20 The Trifid Nebula

M20 - Trifid Nebula (Emission/Reflection Nebula)M20 is the famous Trifid Nebula, a bright colorful emission and reflection nebula that's located in Sagittarius. At magnitude +6.3, it's visible with binoculars. This remarkable object not only contains an emission and reflection nebula but also a dark nebula and an embedded open cluster. When photographed or imaged it looks spectacular, with the emission nebula appearing red, the reflection nebula blue and numerous dark lanes mixed in between. The dark lanes appear to cut through the nebula splitting it into three prominent sections, hence the popular name Trifid, which means divided into three lobes. The much larger and brighter Lagoon Nebula (M8) is located two degrees south of M20, with tightly packed open cluster M21 positioned 0.75 degrees northeast of M20. Charles Messier discovered both M20 and M21 on June 5, 1764. He referred to M20 as an envelope of nebulosity. It is 5,200 light-years away with a radius of 21 light-years.

Information Credits: Home Free Star Charts

Telescope: Explorer Scientific 127mm CF APO Refractor f/7.5

Mount IOptron CEM40

Camera ZWO1600MM Temp -15C Binning 1 x 1
ZWO EFW

64 X 60 Second Exposures W/ZWO Green Filter Gain 75 Offset 21
35 X 180 Second Exposures W/ZWO Ha Filter (7nm) Gain 139 Offset 21
35 X 180 Second Exposures W/Celestron OIII Filter (8.5nm) Gain 139 Offset 21
20 Dark Frames
Total Integration Time: 4 Hours 33 Minutes

Acquisition with SharpCap
Stacked with Deep Sky Stacker
Guiding PHD2
Processed with Astra Image

Photo taken from Seven Lakes, NC Bortle 4.5

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Status	Advanced success
Started	...
Astrometry.net job	5522261
PixInsight job	6O9MYFFQD46KQZ6RE3FQ9AH9E0QCIL6D
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h02m24s.599
RA (top/left)	18h03m47s.845
RA (top/right)	18h03m38s.576
RA (bottom/right)	18h01m01s.824
RA (bottom/left)	18h01m10s.107

Dec (center)	-23°01′58″.53
Dec (top/left)	-23°25′06″.16
Dec (top/right)	-22°37′16″.65
Dec (bottom/right)	-22°38′48″.60
Dec (bottom/left)	-23°26′37″.99

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M20 The Trifid Nebula

M20 The Trifid Nebula

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M20 The Trifid Nebula

M20 The Trifid Nebula

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