California Nebula in SHO (Aaron Freimark)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: California Nebula · LBN 756 · LDN 1463 · LDN 1464 · LDN 1469 · NGC 1499 · Sh2-220

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California Nebula in SHO

Link to TIFF/FITS: https://www.dropbox.com/s/0uth3qengs80ldi/California-SHO_scnr_L_ct_denoiseAI_stars.xisf?raw=1

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California Nebula in SHO

Link to TIFF/FITS: https://www.dropbox.com/s/0uth3qengs80ldi/California-SHO_scnr_L_ct_denoiseAI_stars.xisf?raw=1

The California Nebula, which is a magnificently bright and large nebula in the constellation Perseus. I shot this January 31 and February 1.

When I imaged this in 2020, I had a wider telescope that showed somewhat less detail.

Processing

WeightedBatchProcessing to calibrate, register, and integrate
Drizzle Integration
Dynamic Crop
EZ Denoise
StarXTerminator on the linear image

Starless

Arcsinhstretch
CloneStamp to clean up SII artifacts (StarXTerminator did really well on Ha and OIII)
PixelMath to combine a narrowband mix: R: 0.8*SII+0.2*Ha / G: Ha / B: OIII
SCNR
Apply Ha as L using LRGBCombination
CurvesTransformation
Topaz Denoise AI

Stars

LinearFit Ha and SII to OIII
ChannelCombination
SCNR
HistogramTransformation

Combination

PixelMath: 1-((1-SHO)*(1-stars))

Northeast Imagers
Mid-Hudson Astronomical Association (MHAA)

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	Distinct awarded users	Total awarded images
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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
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.

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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.
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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	5494718
PixInsight job	3V6K52ZZH9YPV2KI23Q3QQ4LWYYY0F9A
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h01m41s.304
RA (top/left)	03h58m42s.742
RA (top/right)	04h00m13s.671
RA (bottom/right)	04h04m37s.727
RA (bottom/left)	04h03m10s.713

Dec (center)	+36°18′31″.77
Dec (top/left)	+36°47′49″.20
Dec (top/right)	+35°35′45″.70
Dec (bottom/right)	+35°48′58″.61
Dec (bottom/left)	+37°01′13″.59

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California Nebula in SHO

California Nebula in SHO

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California Nebula in SHO

California Nebula in SHO

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Description

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Sky plot

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In these public groups

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