North America & Pelican, Dual Narrowband (pcyvr)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: 55 Cyg · 56 Cyg · 57 Cyg · 60 Cyg · 62 ksi Cyg · B349 · B350 · B352 · B353 · B355 · B358 · IC 5070 · LBN 329 · LBN 334 · LBN 338 · LBN 341 · LBN 342 · LBN 343 · LBN 348 · LBN 349 · LBN 350 · LBN 353 · LBN 354 · LBN 356 · LBN 359 · LBN 363 · LBN 365 · LBN 371 · LBN 373 · LBN 378 · And 23 more.

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North America & Pelican, Dual Narrowband

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North America & Pelican, Dual Narrowband

First attempt at narrowband. I'm really happy with how this turned out. There's a lot of discussion about how much mileage you get out of narrowband filters with un-modded DSLRs / mirrorless cameras. Mileage will vary, of course, but the Fuji XT3 seems to be capturing a fair amount of the H-alpha emission.

Very little post-processing done on this image beyond the default stretch applied by APP. Did some minor level and curve adjustment, and softened the halo around one of the brighter stars.

The final revision was obtained by extracting the Ha and O-III channels from the RGB image and recombining them using the HOO formula in AstroPixelProcessor. I put a bit more emphasis on the O-III channel which has resulted in a bit more blue showing up in the nebula.

Also learned to balance the mount east heavy. I had to throw out 4 of the first 15 subs. But after re-balancing, putting slightly more weight on the east side of the mount, all the subs were keepers.

Still have a lot to learn but the journey has been great so far!

Original
B
Final
C

B

Description: This one cropped and processed using the HOO formula in APP.

Uploaded: ...

C

Description: A bit more background subtraction on this one, leading to better separation of the nebula. And a little less emphasis on the blue channel when producing the HOO image.

Uploaded: ...

Unmodified DSLR Deep Sky
iOptron Skyguider Pro

Nebulas

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Status	Advanced success
Started	...
Astrometry.net job	4065833
PixInsight job	67PTI24XGK82IZWMEVAMWV9A5OOCMX37
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h56m10s.84
RA (top/left)	21h08m52s.18
RA (top/right)	20h42m58s.83
RA (bottom/right)	20h44m13s.82
RA (bottom/left)	21h08m41s.62

Dec (center)	+44°34′17″.9
Dec (top/left)	+46°13′45″.5
Dec (top/right)	+46°05′14″.10
Dec (bottom/right)	+42°50′02″.5
Dec (bottom/left)	+42°57′52″.6

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North America & Pelican, Dual Narrowband

North America & Pelican, Dual Narrowband

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North America & Pelican, Dual Narrowband

North America & Pelican, Dual Narrowband

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C

Sky plot

Histogram

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