NGC7023: The Iris Nebula (David Redwine)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD200775 · Iris Nebula · LBN 487 · LDN 1174 · NGC 7023

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NGC7023: The Iris Nebula

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NGC7023: The Iris Nebula

NGC7023: The Iris Nebula

June 2, 3, 7 ,20 ,21 , 22

Red    75x240s
Green 69x2402
Blue    63x240

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   Over the last 4 weeks I spent all of my available imaging nights on the Iris nebula, hoping to get a deep image showing the darker parts of this complex nebula. After processing the data I was very disappointed, but I posted my image anyway, and I am very glad I did.

    After I posted the image I got a comment from Uwe Deutermann suggesting there was something wrong with my image. A quick check verified that I had a "black hole" in my image that should not have been there. After an hour or so of checking files I realized that instead of using the Master Dark from my M51 data-set I had used the Master Blue image! I had subtracted M51 from my Iris!

Thanks to Uwe's sharp eye I was able to find and correct the mistake. The final result is much closer to what I expected.

Thanks Uwe!

Original
Final
B
C
D

B

Description: De-greened

Uploaded: ...

C

Title: Guidance data: CGX-L shooting the Iris

Uploaded: ...

D

Title: Starless Version using StarNet2

Description: StarNet2 de-stared
Up-sampled 2X with Topaz Gigapixel
PS Gaussian blur 1.4 pixels
Down-sampled 2X

Uploaded: ...

Central USA
Imaged with APT

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	5912761
PixInsight job	5C89QKPWH0Q8Y32IL25EIU6XSG0A0UPB
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m28s.882
RA (top/left)	20h59m15s.737
RA (top/right)	20h58m17s.557
RA (bottom/right)	21h03m46s.649
RA (bottom/left)	21h04m35s.760

Dec (center)	+68°09′57″.80
Dec (top/left)	+67°48′12″.69
Dec (top/right)	+68°27′43″.59
Dec (bottom/right)	+68°31′35″.90
Dec (bottom/left)	+67°51′57″.41

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NGC7023: The Iris Nebula

NGC7023: The Iris Nebula

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NGC7023: The Iris Nebula

NGC7023: The Iris Nebula

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