The Lagoon Nebula, M8, in H-alpha light (Paul Lloyd)

Celestial hemisphere: Southern · Constellation: Sagittarius (Sgr) · Contains: 7 Sgr · 9 Sgr · B296 · B88 · B89 · HD164266 · HD164385 · HD164386 · HD164536 · HD164865 · HD164906 · HD164933 · HD165016 · HD165052 · HD165246 · HD165321 · HD165345 · HD315031 · HD315033 · LBN 25 · LBN 26 · LDN 180 · Lagoon Nebula · M 8 · NGC 6523 · NGC 6526 · NGC 6530 · Sh2-25 · The star 7 Sgr · The star 9 Sgr

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The Lagoon Nebula, M8, in H-alpha light

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The Lagoon Nebula, M8, in H-alpha light

The Lagoon Nebula has been known for quite some time, having been discovered before 1654
by Hodierna. It is one of a few star-forming regions visible to the unaided eye at mid-northern
latitudes. It lies some 4,100 ly away, and is huge, measuring at 50 x 110 ly. This is an emission
nebula, with both H-α and H-β being prominent. It is host to a number of distinct structures and
star clusters, including NGC 6523, NGC 6530 (star clusters), and the Hourglass Nebula around
the hot O-type star near the centre.

In this image I have concentrated on just the H-α emissions. This accentuates the complex
structure of the nebula cloud.

Telescope: Askar PHQ107 f/7 refractor (f = 750mm)
Camera:      ZWO ASI294MC Pro
Exposure:   40 x 300 sec, Optolong 7nm H-α filter
                    Bortle 3-4 sky, 25% Moon?Field of View: approx. 1º 25’ x 1º 00’
Image processed and prepared in PixInsight and Photoshop Elements

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Status	Advanced success
Started	...
Astrometry.net job	8546547
PixInsight job	U0QOX0VFZBC0KNBICLMFC2HSBZXZIR0S
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	18h04m16s.15
RA (top/left)	18h07m20s.82
RA (top/right)	18h01m11s.71
RA (bottom/right)	18h01m09s.75
RA (bottom/left)	18h07m22s.16

Dec (center)	-24°20′17″.5
Dec (top/left)	-23°50′19″.6
Dec (top/right)	-23°50′11″.4
Dec (bottom/right)	-24°50′03″.3
Dec (bottom/left)	-24°50′08″.9

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The Lagoon Nebula, M8, in H-alpha light

The Lagoon Nebula, M8, in H-alpha light

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The Lagoon Nebula, M8, in H-alpha light

The Lagoon Nebula, M8, in H-alpha light

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