**** Cassiopeia Constellation **** *** IC 1805 - The Heart Nebula *** (Konstantinos Tsekas)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1795 · IC 1805 · NGC 896

** Cassiopeia Constellation * IC 1805 - The Heart Nebula ***

Link: https://www.flickr.com/photos/145227632@N04/50352441408/in/datetaken/?fbclid=IwAR3Hds4aWrqlrDRNm5PjYJq9MGSCOtHVk0kJz06wB6kJ73Sv8Y2vVHsMe50

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** Cassiopeia Constellation * IC 1805 - The Heart Nebula ***

Link: https://www.flickr.com/photos/145227632@N04/50352441408/in/datetaken/?fbclid=IwAR3Hds4aWrqlrDRNm5PjYJq9MGSCOtHVk0kJz06wB6kJ73Sv8Y2vVHsMe50

**** Cassiopeia Constellation ****

*** IC 1805 - The Heart Nebula ***

What energizes the Heart Nebula? First, the large emission nebula dubbed IC 1805 looks, in whole, like a human heart. The nebula glows brightly in red light emitted by its most prominent element: hydrogen. The red glow and the larger shape are all powered by a small group of stars near the nebula's center. In the center of the Heart Nebula are young stars from the open star cluster Melotte 15 that are eroding away several picturesque dust pillars with their energetic light and winds. The open cluster of stars contains a few bright stars nearly 50 times the mass of our Sun, many dim stars only a fraction of the mass of our Sun, and an absent microquasar that was expelled millions of years ago. The Heart Nebula is located about 7,500 light years away toward the constellation of Cassiopeia.

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Location: Stinger of Scorpius Observatory, Filiates, Thesprotia - Greece.

Work in progress.....

Bortle Scale: Class 4

Constellation: Cassiopeia

Imaging Telescope: William optics star 71 f/4.9

Equatorial Mount: Avalon linear fast reverse (Avalon Instruments)

Guide Scope : Skywatcher ed80 Black Diamond

Guide Camera:ZWO ASI290MM Mini (mono)

Main Camera: CCD Atik One 6.0 Monochrome

Filters: Astrodon Hydrogen Alpha 5nm

Exposures: 60X600sec for Hydrogen Alpha : (10 hours total)

Binning: 1x1

Image Calibration: 60 dark frames, 230 bias frames, 35 flat frames

Sensor temperature: -10°C

Image acquisition software: Artemis Capture

Telescope guiding software: PHD2

Processing software: Pixinsight - CCD stack - Photoshop CS6

Acquisition dates: 12/09/2020 - 13/09/2020 (H-Alpha Filter)

Total exposure : 10 hours

Please note: The following tables are updated every 24 hours.

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	Distinct awarded users	Total awarded images
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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
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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
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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	Basic success
Started	...
Astrometry.net job	4226588
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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** Cassiopeia Constellation * IC 1805 - The Heart Nebula ***

** Cassiopeia Constellation * IC 1805 - The Heart Nebula ***

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**** Cassiopeia Constellation **** *** IC 1805 - The Heart Nebula ***

**** Cassiopeia Constellation **** *** IC 1805 - The Heart Nebula ***

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** Cassiopeia Constellation * IC 1805 - The Heart Nebula ***

** Cassiopeia Constellation * IC 1805 - The Heart Nebula ***