NGC 2997 framed with glowing hydrogen (Niall MacNeill)

Celestial hemisphere: Southern · Constellation: Antlia (Ant) · Contains: HD84431 · HD84752 · HD84753 · HD84823 · HD84824 · NGC 2997

NGC 2997 framed with glowing hydrogen

NGC 2997 is a face-on unbarred spiral galaxy about 40 million light-years away in the faint southern constellation of Antlia. It was discovered March 4, 1793, by German-born astronomer William Herschel.
This is a grand-design galaxy, a two-armed form. The morphological classification of NGC 2997 is SAB(rs)c, indicating a weakly-barred spiral galaxy (SAB) with an incomplete ring around the bar (rs) and loosely-wound spiral arms (c). It is inclined at an angle of 40° to the line of sight from the Earth, with the major axis aligned along a position angle of 110°. The arms host a series of dusty knots that are star-forming regions being generated through gas compression from density waves. At the core, the arms converge to form a circumnuclear ring with symmetrically-placed hot spots containing super star clusters.” …. Wikipedia (abridged)...these hot spots can be seen in my image.

I noticed that there were substantial bands of hydrogen showing up in the Hydrogen Alpha image. It turns out that this whole region is awash with it and I think it frames the galaxy beautifully. I made quite a bit of effort to ensure this Ha signal came through.

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Status	Advanced success
Started	...
Astrometry.net job	9666729
PixInsight job	DE6EUGQOKELGRQHO0NT00QN5XRA1TUJ1
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h45m40s.649
RA (top/left)	09h43m57s.509
RA (top/right)	09h47m22s.994
RA (bottom/right)	09h47m22s.935
RA (bottom/left)	09h43m59s.600

Dec (center)	-31°11′36″.89
Dec (top/left)	-31°33′40″.27
Dec (top/right)	-31°33′49″.20
Dec (bottom/right)	-30°49′28″.40
Dec (bottom/left)	-30°49′18″.58

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NGC 2997 framed with glowing hydrogen

NGC 2997 framed with glowing hydrogen

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NGC 2997 framed with glowing hydrogen

NGC 2997 framed with glowing hydrogen

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