Bubble Nebula (Robert H. Kutner)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · LBN 548 · LBN 549 · LDN 1231 · NGC 7635 · Sh2-162

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Bubble Nebula

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Bubble Nebula

Stellarium 0.20.3 to scout and frame target. ASIAir pro to acquire ~30 x 300s images @ -10c & 120g for Ha, Sii, & Oiii, ~69% were usable. For RGB, for stars, 10 x 10s images @ -10c & 120g.

Blink / Subframe Select, Calibrated (60 Dark, 60 Flat, 100 Bias), Star Aligned all images with PixInsight. Used the Normalized Scale Gradient for integration.

For Ha, Sii, & Oiii channels: Cropped, DBE, TGV, MTT, (& duplicated the Ha here for the Lum), EZ Soft Stretch, StarNet for star removal, and channel combined using PixelMath*. The duplicated Ha -> Lum was Mask Stretched, HDR, LHT, TGV, MMT, EZStar Reduction, and LRGB Combined with the PixelMath SHO image.

RGB filter data combined with Channel Combination, Image was masked with an inverted Star Mask and replaced with SHO image using Pixel Math to add the nebulosity around the stars.

Combined image was TGV, MMT, & Curves modified (w/ masks). Moved to Photoshop to further adjust saturation and contrast, and additional noise reduction. Returned to PI for Resample, Crop, and Annotation.

*R = (Oiii^~Oiii)*Sii + ~(Oiii^~Oiii)*Ha
G = ((Ha*Sii)^~(Ha*Sii))*(.8*Ha+.2*Oiii) + ~((Ha*Sii)^~(Ha*Sii))*(.9*Oiii)
B = .9*Oiii + .1*Ha

Cloudy Nights
William Optics GT Series

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	5102031
PixInsight job	BW84M5LK21G9HXIGBQ7VOMKK6KKETDON
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h20m23s.255
RA (top/left)	23h23m27s.290
RA (top/right)	23h22m24s.974
RA (bottom/right)	23h17m14s.207
RA (bottom/left)	23h18m24s.520

Dec (center)	+61°07′11″.37
Dec (top/left)	+60°42′23″.63
Dec (top/right)	+61°36′54″.38
Dec (bottom/right)	+61°31′36″.28
Dec (bottom/left)	+60°37′07″.100

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Bubble Nebula

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Bubble Nebula

Bubble Nebula

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