The Lesser Iris Nebula (Todd Stephens)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 4 Cep · HD195527 · HD195937 · HD198385 · HD198737 · HD200099 · HD200775 · HD202181 · Iris Nebula · LBN 468 · LBN 475 · LBN 483 · LBN 487 · 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 · NGC 7023 · T Cep · The star 4 Cep

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The Lesser Iris Nebula

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The Lesser Iris Nebula

Because the dark nebula to the right looks like a "less-than" sign... oh nevermind.

Widefield image of NGC 7023 and surrounding dust and dark nebulae. This was shot over several sessions as I was troubleshooting a mount connection problem. It took 5 sessions to get around 8 hours of data due to the rig randomly shutting down while unattended, which I finally traced to a bad USB heater taking down all USB communication.

Shot with my reduced AT60ED scope, Canon 600D, and CEM40. 248 120-second lights at ISO800 and f/4.8. Calibrated and stacked in APP, then post processed in PI and GIMP with StarnetV2 and NoiseXTerminator.

As always, C&C welcome and appreciated!

Original
B
Final
C

B

Description: I spent a little more time getting the background more to my liking, and used PixelMath to reintroduce the stars rather than as a blending layer in GIMP. The PixelMath method seems to produce a much cleaner result to my eyes.

Uploaded: ...

C

Description: Trying to handle the starfield a little better, plus some MultiscaleLinearTransform to sharpen the nebula just a bit.

Uploaded: ...

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
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Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
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	6145912
PixInsight job	IGORHWNKO6VHD9YOUX9C49CF6AKWN3ZN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h51m31s.33
RA (top/left)	21h15m04s.34
RA (top/right)	20h26m04s.56
RA (bottom/right)	20h30m55s.92
RA (bottom/left)	21h14m21s.37

Dec (center)	+67°48′06″.1
Dec (top/left)	+69°16′34″.8
Dec (top/right)	+68°57′20″.3
Dec (bottom/right)	+66°08′16″.7
Dec (bottom/left)	+66°25′27″.8

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The Lesser Iris Nebula

The Lesser Iris Nebula

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Image Index:

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The Lesser Iris Nebula

The Lesser Iris Nebula

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