SH2-173 Phantom of the Opera (Dan Kusz)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 12 Cas · HD1166 · HD1201 · HD1383 · HD1400 · HD1544 · HD1545 · HD1613 · HD1697 · HD1743 · HD1810 · HD1843 · HD1917 · HD236377 · LBN 592 · LBN 593 · LDN 1280 · LDN 1282 · LDN 1283 · NGC 103 · Sh2-173 · The star 12 Cas

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SH2-173 Phantom of the Opera

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SH2-173 Phantom of the Opera

SH2-173, or The Phantom of the Opera Nebula, this one actually resembles its nickname!

It is an H II region 77 light-years in diameter, located about 8800 light-years away. It is located on the Perseus Arm, one of the major spiral arms of the Milky Way. It contains a large number of young stars, of which there would be at least 7 of them among the main responsible for the ionisation of gases, the hottest of which is catalogued as BD+60 39.

No magnitude measurements for this nebula are available that I could find, all I can say it is very dim, only showing up in Ha decently using 10 min sub exposures. I was going to collect more Ha data on this target, but after a quick stack, I thought this was enough. The data was clean and enough of it to pull out the Ha above the background. I tried to bring out some of the surrounding nebulosity, but this is significantly dimmer than the main nebula and would require much more integration time.

This is the first image since the fires calmed down, back to clear skies I hope!

CS and be well
Dan.

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Description: Cropped and contrast boost

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Description: Fresh redo with better Ha color

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The refractors!
Canadian Astrophotography
Pacific Northwest Astrophotographers

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Status	Advanced success
Started	...
Astrometry.net job	6873652
PixInsight job	N7JNME9D2PNA56WQNP3Q6KORIK9AWRPY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h22m18s.99
RA (top/left)	00h25m12s.83
RA (top/right)	00h14m07s.86
RA (bottom/right)	00h19m37s.82
RA (bottom/left)	00h30m05s.90

Dec (center)	+61°45′10″.4
Dec (top/left)	+62°55′15″.1
Dec (top/right)	+62°30′10″.4
Dec (bottom/right)	+60°34′55″.3
Dec (bottom/left)	+60°58′26″.5

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SH2-173 Phantom of the Opera

SH2-173 Phantom of the Opera

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