Iris Nebula (Johnny Qiu)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD200775 · Iris Nebula · LBN 487 · LDN 1174 · NGC 7023 · PGC 2817439

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Iris Nebula

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Iris Nebula

The Iris Nebula is a reflection nebula located in the constellation Cepheus, hidden deep in the starry sky and shining brightly. Despite having "nebula" in its name, it is actually an interstellar cloud composed of a large amount of dust and gas. The bright star in the center of this photo is the +7.4 magnitude star HD200775. The dust and gas surrounding this star is illuminated, forming unique shapes and colors, hence the nickname "Iris". It is approximately 1300 light years away from the Earth and has a diameter of about 6 light years.

The photo was taken with LRGB filters, each frame for 5 minutes. Because the central star is very bright, it caused the central star and a small part of the nebula in each L frame to be overexposed. Additional 10-second L frames were later captured and finally composed into HDR.

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
Image of the day
Top picks
Top pick nominations

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
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

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
Own remote observatory
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	7921378
PixInsight job	Y5GPLEGZRLJ161FS4HUC1157ZAEQ8CSG
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m37s.550
RA (top/left)	21h04m40s.438
RA (top/right)	20h58m35s.190
RA (bottom/right)	20h58m36s.511
RA (bottom/left)	21h04m36s.530

Dec (center)	+68°09′47″.76
Dec (top/left)	+68°20′49″.65
Dec (top/right)	+68°21′01″.41
Dec (bottom/right)	+67°58′33″.17
Dec (bottom/left)	+67°58′21″.70

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Iris Nebula

Iris Nebula

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Iris Nebula

Iris Nebula

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