IC 1805 - Heart Nebula - Mosaic (Dale Hollenbaugh)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1795 · IC 1805 · IC 1824 · NGC 1027 · NGC 896 · Sh2-190

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IC 1805 - Heart Nebula - Mosaic

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IC 1805 - Heart Nebula - Mosaic

IC 1805 - Heart Nebula - Mosaic

This is my first view of the Heart Nebula. Too big for my field of view, so I did a two-panel mosaic over two nights, using the simple eye-ball method and "goto here" function of ASIAir Pro, which had just about the right amount of overlap. Optolong L-eXtreme worked well to suppress bright moonlight. It is my first time trying of a mosaic, and the defaults in AstroPixelProcessor left visible lines between panels that I couldn't get rid of without re-doing it in APP with these settings:

Tab 4: Scale start 4, scale stop 12

Tab 5: Advanced mode

Tab 6: 5% MBB, 1st degree LNC with 4 iterations

This solved the panel lines and cleaned it up nicely, but took overnight to process.

PixInsight and StarNet++ to remove stars for nebula processing in PhotoShop and then to reintegrate stars before going back for final tweaks and cropping in PhotoShop.

Pretty pleased with the results. It is my highest megapixel photo so far - 39+ megapixels and the one with the most hours of integration - 10 hours. Best 200 stacked images out of 400.

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	4322295
PixInsight job	P1SHGEGN2XDFH7IQ2CWZVI9U7GV4Q69E
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	02h33m45s.27
RA (top/left)	02h40m33s.27
RA (top/right)	02h45m22s.54
RA (bottom/right)	02h27m34s.91
RA (bottom/left)	02h21m22s.75

Dec (center)	+61°28′47″.9
Dec (top/left)	+63°04′01″.8
Dec (top/right)	+60°23′27″.1
Dec (bottom/right)	+59°51′52″.3
Dec (bottom/left)	+62°29′56″.8

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IC 1805 - Heart Nebula - Mosaic

IC 1805 - Heart Nebula - Mosaic

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Image Index:

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IC 1805 - Heart Nebula - Mosaic

IC 1805 - Heart Nebula - Mosaic

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