IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor (Alberto Maria Casati)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD15522 · HD15557 · HD15558 · HD15570 · HD15629 · HD15851 · IC 1805 · LBN 654 · LDN 1361 · LDN 1364 · LDN 1366 · LDN 1367 · LDN 1368 · LDN 1369 · LDN 1372 · LDN 1373 · Sh2-190

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IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor

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IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor

In the Heart of the Heart Nebula (IC1805 or W4). A diffuse nebula about 7,500 light-years distant from the earth, and belonging to the Constellation Cassiopeia, towards the border with the Giraffe. Within this nebula there are multiple episodes of star formation and a system of small, sparsely concentrated open clusters responsible for the ionization of the nebula. The most notable of these is Melotte 15, which contains some stars about 50 times more massive than the Sun, plus other smaller stars and a microquasar ejected millions of years ago. In the photograph the blue areas represent the ionized oxygen, while the red ones the hydrogen H-alpha line. From this region emerge more than 30 molecular clouds and globules dispersed in the surrounding space.

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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
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.
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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	6659184
PixInsight job	C80QQMFMX1SAHMLCZA6NNWH2H5KO28ON
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h32m55s.73
RA (top/left)	02h37m26s.90
RA (top/right)	02h27m19s.57
RA (bottom/right)	02h28m33s.50
RA (bottom/left)	02h38m24s.99

Dec (center)	+61°27′47″.9
Dec (top/left)	+61°57′23″.10
Dec (top/right)	+61°45′31″.2
Dec (bottom/right)	+60°57′40″.7
Dec (bottom/left)	+61°09′12″.2

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IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor

IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor

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IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor

IC 1805 - W4 - In the Hearth of the Hearth - -Bicolor

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