NGC 7023 iris nebula (vikas chander)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · LBN 475 · LBN 487 · LDN 1167 · LDN 1168 · LDN 1170 · LDN 1171 · LDN 1172 · LDN 1173 · LDN 1174 · NGC 7023 · T Cep · VdB139

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NGC 7023 iris nebula

Link: https://www.vikaschander.com/ngc-7023-iris-nebula-2/

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NGC 7023 iris nebula

Link: https://www.vikaschander.com/ngc-7023-iris-nebula-2/

Quoting NASA…. While many of the nebulae visible in the night sky are emission nebulae — clouds of dust and gas that are hot enough to emit their own radiation and light — Caldwell 4, otherwise known as the Iris Nebula or NGC 7023, is a reflection nebula. This means that its color comes from the scattered light of its central star, which lies nestled in the abundant star fields of the constellation Cepheus. Located some 1,400 light-years away from Earth, the Iris Nebula’s glowing gaseous petals stretch roughly 6 light-years across. While the Iris Nebula appears predominantly blue, it includes large filaments of deep red, indicating the presence of an unknown chemical compound likely based on hydrocarbons. Studying nebulae like this one helps astronomers learn more about the ingredients that combine to make stars.

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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

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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Star trails
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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
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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	4964124
PixInsight job	Q38OGS8WFSA8WTFO03E7PJDYMXNAILIN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m49s.45
RA (top/left)	21h10m13s.44
RA (top/right)	20h51m26s.76
RA (bottom/right)	20h54m05s.70
RA (bottom/left)	21h11m32s.89

Dec (center)	+67°47′49″.5
Dec (top/left)	+68°44′00″.5
Dec (top/right)	+68°32′19″.9
Dec (bottom/right)	+66°50′12″.8
Dec (bottom/left)	+67°01′00″.8

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NGC 7023 iris nebula

NGC 7023 iris nebula

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NGC 7023 iris nebula

NGC 7023 iris nebula

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