First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition) (Brandon Tackett)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · LBN 487 · LBN 495 · LDN 1168 · LDN 1170 · LDN 1171 · LDN 1172 · LDN 1173 · LDN 1174 · LDN 1177 · NGC 7023 · Sh2-136 · T Cep · VdB139 · VdB141

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First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition)

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First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition)

I attempted to add an HA layer to my OSC color version from last year. What I thought was Ha signal ended up being more dust than Ha background.

During the process, I tried using the GHS (generalize hyperbolic stretch) for the first time after watching the creators present on TAIC. Still a learning curve, but the results are impressive with a great improvement in the stars. Also, the detail present in the center of the the iris nebula that was maintained with the new script really made the image have greater character.

I had forgot about the satellite trails in the original data and will have to clean those up later at a different time.

I have added my shot comparison from last year as well as the Ha alone.

Final
Original
B
C

B

Title: 2021 OSC Version

Uploaded: ...

C

Title: 2022 Ha Only

Uploaded: ...

Schmidt-Cassegrain Telescope (SCT) Imagers
Celestron RASA
ZWO ASI294MM Pro Images
N.I.N.A. Users
ZWO ASI 294MC PRO
Central USA

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Status	Advanced success
Started	...
Astrometry.net job	5823133
PixInsight job	P33WG3ZYRRLQCZW3S6DXEPRMFA6728HS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h07m54s.10
RA (top/left)	20h53m37s.10
RA (top/right)	21h21m31s.35
RA (bottom/right)	21h23m16s.70
RA (bottom/left)	20h53m06s.92

Dec (center)	+68°20′08″.1
Dec (top/left)	+67°27′35″.3
Dec (top/right)	+67°22′31″.3
Dec (bottom/right)	+69°07′45″.0
Dec (bottom/left)	+69°13′16″.2

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First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition)

First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition)

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First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition)

First GHS Attempt Iris and Ghost Nebula RASA 8 (failed Ha Addition)

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