The Heart Nebula in Narrowband (Ken Sablinsky)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1795 · IC 1805 · IC 1824 · IC 1831 · LBN 642 · LBN 645 · LBN 646 · LBN 647 · LBN 648 · LBN 650 · LBN 654 · LBN 655 · LBN 656 · LBN 657 · LBN 658 · LBN 660 · LBN 661 · LBN 662 · LDN 1354 · LDN 1356 · LDN 1359 · LDN 1360 · LDN 1361 · LDN 1362 · LDN 1363 · LDN 1364 · LDN 1365 · LDN 1366 · LDN 1367 · LDN 1368 · And 13 more.

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The Heart Nebula in Narrowband

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The Heart Nebula in Narrowband

The Heart Nebula, shot in HOO with RGB stars overlaid. I'm making more progress in blending the RGB stars without artifacts or halos around them. The StarXTerminator star removal tool makes it MUCH easier to process compared with the StarNet++ tool. Being able to remove the stars on the linear image before stretching really helps the processing workflow. I can stretch the image much more aggressively without worrying about star bloat or OIII blue halos around brighter stars. And in this image, I applied a deconvolution to the Ha frame with no stars present, using a parametric PSF.

Still a work in progress - my OIII channel is much more noisy than the Ha, leading to a lot of bluish noise in the background which I tried to minimize here with TGV.

20x 1200s Ha
20x 1200s OII
25x each 90s RGB for the stars

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	5172651
PixInsight job	AP87J9WGER5UWSISWZWZPPH7A2GJ8GJS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h33m40s.67
RA (top/left)	02h19m00s.79
RA (top/right)	02h48m52s.30
RA (bottom/right)	02h49m38s.44
RA (bottom/left)	02h17m14s.69

Dec (center)	+61°29′41″.9
Dec (top/left)	+60°07′35″.5
Dec (top/right)	+60°12′38″.4
Dec (bottom/right)	+62°45′14″.1
Dec (bottom/left)	+62°39′51″.8

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The Heart Nebula in Narrowband

The Heart Nebula in Narrowband

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The Heart Nebula in Narrowband

The Heart Nebula in Narrowband

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