Extended Dust around the Iris (Todd Stephens)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 4 Cep · 7 Cep · Iris Nebula · LBN 468 · LBN 475 · LBN 483 · LBN 487 · LBN 495 · LDN 1147 · LDN 1148 · LDN 1152 · LDN 1155 · LDN 1157 · LDN 1158 · LDN 1167 · LDN 1168 · LDN 1170 · LDN 1171 · LDN 1172 · LDN 1173 · LDN 1174 · LDN 1176 · LDN 1177 · NGC 7023 · Sh2-136 · T Cep · The star 4 Cep · The star 7 Cep · VdB139 · VdB141

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Extended Dust around the Iris

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Extended Dust around the Iris

2-panel mosaic of the dusty region around NGC 7023. I started shooting this earlier this spring, but between equipment problems, bad weather, and short nights, I was only able to get 8 hours of integration time on one panel over several nights. Between light pollution and moonlight gradients, the data just wasn't very good so I dumped it and started over.

This is two panels shot with my H-a modded Canon 600D, AT60ED w/ 0.8x reducer, and CEM40. I shot each panel over two nights to try to get the background noise to a manageable level. I ended up with 33.5 hr integration time on this one of mostly 180-second subs in B-3 skies south of Marquette, MI. Stacked and mosaicked in Astro Pixel Processor, with post processing done in PixInsight with great help from GHS, StarnetV2, and NoiseXTerminator.

I'm not entirely happy with the star reduction, but was trying to find a decent balance between showing the background dustiness and the halos left behind from the bloated stars with the little doublet. As always, C&C welcome and appriecated!

Original
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Final
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Title: Starless version

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Status	Advanced success
Started	...
Astrometry.net job	6552961
PixInsight job	NF518VR90ENDT3KK8LMFKP4EUCUVGJ5Q
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h00m50s.75
RA (top/left)	21h34m48s.95
RA (top/right)	20h25m46s.19
RA (bottom/right)	20h31m15s.10
RA (bottom/left)	21h32m21s.97

Dec (center)	+67°54′35″.4
Dec (top/left)	+69°18′11″.2
Dec (top/right)	+68°57′11″.5
Dec (bottom/right)	+66°07′59″.3
Dec (bottom/left)	+66°25′59″.9

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Extended Dust around the Iris

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