IRIS NEBULA - NGC 7023 (Drew Evans)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD200775 · HD202012 · Iris Nebula · LBN 475 · LBN 487 · LDN 1167 · LDN 1168 · LDN 1170 · LDN 1171 · LDN 1172 · LDN 1173 · LDN 1174 · NGC 7023 · T Cep

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IRIS NEBULA - NGC 7023

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IRIS NEBULA - NGC 7023

This is a reflection nebula in Cepheus 1300 light-years from Earth. Within, we see a hot newborn star, HD2000775, of 10 solar masses emerging from a massive dust cloud.

The surrounding dust scatters the star's visible light, just as our atmosphere scatters sunlight in the sky, rendering the nebula sky blue. The blue nebula is surrounded by dark obscuring clouds of dust. Throughout this wide field of view you can see a lot of dark interstellar dust (dark nebulae) from which individual stars form from.

OTA: William Optics GT81 using 0.8x Flat6A-81 reducer
Mount: Celestron CGX-L
Camera: ZWO ASI533MC Pro
Gain: 100

Filter: 2" Baader UV/IR Cut

Night 1
84x300s = 7hrs

Night 2
91x300s = 7.6hrs

Night 3
36x300s = 3hrs

17.6 hours total

Cooling Temperature: -10 Celsius
Auto-guiding: ZWO ASI174MM Mini and ZWO M48 OAG
Control: ZWO ASIAIR Pro

Flagstaff, AZ - Bortle 4 skies

Calibrated in Astro Pixel Processor⁣ with darks and flats
Processed in Pixinsight and Lightroom

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
Artificial satellite

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	...
PixInsight job	W37GXRNDLZH8UZGMIEKX5AZWZ7N9HRXY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m35s.86
RA (top/left)	21h09m56s.64
RA (top/right)	20h52m12s.58
RA (bottom/right)	20h53m50s.80
RA (bottom/left)	21h10m23s.60

Dec (center)	+67°44′26″.3
Dec (top/left)	+68°36′07″.5
Dec (top/right)	+68°30′02″.6
Dec (bottom/right)	+66°51′18″.4
Dec (bottom/left)	+66°56′56″.4

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IRIS NEBULA - NGC 7023

IRIS NEBULA - NGC 7023

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IRIS NEBULA - NGC 7023

IRIS NEBULA - NGC 7023

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