IC1805 Heart Nebula's Starless Core (Mau_Bard)

IC1805 Heart Nebula's Starless Core

The Heart Nebula (also known as the Running dog nebula), IC 1805, Sharpless 2-190, is one of the most photographed objects of the sky, and with very good reasons. The core of the nebula, hosting the star cluster Collinder 26 (alternatively: Melotte 15), is particularly spectacular and I propose it to you here in a starless version.

The picture is a pure HOO, recorded on 16 and 17 October 2022 from my backyard in Vienna.

IC1807 is 7500 light years away from the Earth and is located in the Perseus Arm of the Milky Way.
It was discovered by William Herschel on 3 November 1787.

The full nebula spans almost 2 degrees in the sky, covering an area four times that of the diameter of the full moon. Its estimated cross-size is 200 light years.

Position of Heart and Soul Nebulae in Milky Way's arms. Taken from www.atlasoftheuniverse.com

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ZWO ASI 2600MC PRO
Duo-band, Tri-band, and Quad-band Imaging
Hydrogen and Oxygen Narrowband Only!
Cooled Color Cams
Sharpless2 Objects
Light Polluted skies
Suburban Astrophotography
Fine Art Astrophotography
PixInsight Addicts
N.I.N.A. Users
Austria Astrophotography
Imaged with N.I.N.A.
Reflecting Telescope Group
Imagers of Italy
Musical Imagers
Narrowband imaging

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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.
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.

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