A Widefield Elephant Trunk in Hydrogen Alpha (Todd Stephens)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 12 Cep · 13 Cep · B157 · B160 · B161 · B162 · B163 · B165 · B166 · B167 · B170 · B364 · B365 · B366 · B367 · B368 · Erakis · IC 1396 · NGC 7127 · PK096+02.1 · PK097+03.1 · PK098+02.1 · PK098+04.1 · PK100+04.1 · Sh2-127 · Sh2-128 · Sh2-131 · The star 12Cep · The star 13Cep · The star Garnet Star (μCep) · And 3 more.

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A Widefield Elephant Trunk in Hydrogen Alpha

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A Widefield Elephant Trunk in Hydrogen Alpha

Trying to get the hang of this H-a filter...

Had a clear night around the full moon, so I wanted to take another run with my mono DSLR and 6-nm H-a filter. I think I got the focus a little bit better, but it's still challenging with such little light hitting the sensor. This is 80 300-second subs with my mono Canon 60D, Rokinon 135mm f/2, iExos-100, and Astronomik 6nm clip-in filter. Stacked in APP, and finished in Starnet++ and GIMP.

I stretched the background a bit too much, and it's somewhat noisy. But I think I prefer seeing some of the background nebulosity, even if it's noisy, rather than a clean black background. Although the nights are cool here, it's still a DSLR.

C&C welcome and appreciated!

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Status	Advanced success
Started	...
Astrometry.net job	5025285
PixInsight job	I49L8XVOCB00LDA76Z5NQ2CFD1BD6L4L
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	21h40m03s.00
RA (top/left)	21h55m21s.84
RA (top/right)	21h59m55s.90
RA (bottom/right)	21h21m25s.23
RA (bottom/left)	21h23m34s.71

Dec (center)	+57°22′12″.0
Dec (top/left)	+53°44′02″.9
Dec (top/right)	+60°44′44″.3
Dec (bottom/right)	+60°51′55″.6
Dec (bottom/left)	+53°49′56″.3

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A Widefield Elephant Trunk in Hydrogen Alpha

A Widefield Elephant Trunk in Hydrogen Alpha

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A Widefield Elephant Trunk in Hydrogen Alpha

A Widefield Elephant Trunk in Hydrogen Alpha

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