IC1805 The Heart Nebula (niteman1946)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1795 · IC 1805 · NGC 1027 · NGC 896

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IC1805 The Heart Nebula

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IC1805 The Heart Nebula

The Heart Nebula, IC 1805, Sharpless 2-190, is some 7500 light years away from Earth and is located in the Perseus Arm of the galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787. It is an emission nebula showing glowing ionized hydrogen gas and darker dust lanes. The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Collinder 26 or 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. [Source: Wikipedia].

The image was captured with the iOptron CEM120 mount , the TMB80SS F6.3 Refractor coupled with an Orion Field Flattener , and my old Canon 450D XSi camera.

All subs were taken a ISO1600 and 300s each. All were done at ambient temperature that varied between 26C and 31C.

IMAGE information -- 2021
Subs (ISO1600, 300s): 141 subs (11.75hr) on Sep 17th and 27th, and Oct 3rd.

Processing was done with PixInsight, following reasonably good practices I’ve developed over the years.

COMMENTS:
This is the least decent image done with my old trusty Canon 450D XSi even though there were close to 12 hours of integration time. I'm posting it on Astrobin just for documentation.

My trusty Atik 383L+mono CCD camera is now officially lost. As reported by Atik Portugal, the authorities attempted to deliver but could not due to Atik Portugal being on holiday. Currently, I have no expectations that the camera will be returned to me.

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
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Star trails
Northern lights
Noctilucent clouds
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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
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	Basic success
Started	...
Astrometry.net job	5066356
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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IC1805 The Heart Nebula

IC1805 The Heart Nebula

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IC1805 The Heart Nebula

IC1805 The Heart Nebula

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