IC1805 - HaOIII-RGB (Thomas Richter)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1805 · Sh2-190

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IC1805 - HaOIII-RGB

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IC1805 - HaOIII-RGB

Rev. A-C: This is a bicolor version of the most interesting part of the Heart Nebula.

Rev. D: Bicolor-Image combined with RGB Stars

Rev. E: another combination of Bicolor and RGB

Thanks for watching !

Object description (wikipedia.org) :

The Heart Nebula, IC 1805, Sharpless 2-190, lies some 7500 light years away from Earth and is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. This is an emission nebula showing glowing gas and darker dust lanes. The nebula is formed by plasma of ionized hydrogen and free electrons.

The very brightest part of this nebula (the knot at the right) is separately classified as NGC 896, because it was the first part of this nebula to be discovered.

Visually, the galaxies Maffei 1 and Maffei 2 are nearby, although light extinction from the Milky Way makes them difficult to find and once they are found, difficult to define features within. Once thought to be part of our own Local Group, they are now known to be part of another nearby group, the IC 342/Maffei Group, the closest galaxy group to our own.

The nebula's intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars known as Melotte 15 contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass. The cluster used to contain a microquasar that was expelled millions of years ago.

Original
B
C
D
Final
E

Astrofreunde-Franken
Narrowband imaging

Nebulea

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	1339549
PixInsight job	GQNOSKYK9MRMP5WRI2YKM4OHS2VKYQAM
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	02h35m58s.19
RA (top/left)	02h36m57s.48
RA (top/right)	02h30m15s.55
RA (bottom/right)	02h35m01s.36
RA (bottom/left)	02h41m42s.37

Dec (center)	+61°27′58″.2
Dec (top/left)	+62°08′45″.6
Dec (top/right)	+61°22′12″.7
Dec (bottom/right)	+60°47′12″.2
Dec (bottom/left)	+61°32′50″.1

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IC1805 - HaOIII-RGB

IC1805 - HaOIII-RGB

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IC1805 - HaOIII-RGB

IC1805 - HaOIII-RGB

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