Lower's Nebula (detail) (Aaron Freimark)

Celestial hemisphere: Northern · Constellation: Orion (Ori) · Contains: HD252245 · HD41997 · LBN 864

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Lower's Nebula (detail)

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Lower's Nebula (detail)

A detail of Lower's Nebula — while I captured the nebula in its entirety, I liked best this colorful structured portion.

Preprocessing

Weighted Batch Preprocessing, with 2x Drizzle
Dynamic Crop

RGB

LinearFit G & B to R
Channel Combination
BlurXTerminator
NoiseXTerminator
ImageSolver
Spectrophotometric Color Calibration
Histogram Transformation
ArcsinhStretch
SCNR

Narrowband (each)

BlurXTerminator
NoiseXTerminator
ArcsinhStretch
StarXTerminator
CurvesTransformation to increase intensity in certain areas
CloneStamp to clean up some star (and galactic) artifacts
CurvesTransformation a second time

Bringing everything together

PixelMath using a modified Dynamic Narrowband Combination:

R: (OIII^~OIII)*SII + ~(OIII^~OIII)*Ha * 0.75
G: ((OIII*Ha)^~(OIII*Ha))*Ha + ~((OIII*Ha)^~(OIII*Ha))*OIII + ~(OIII^~OIII)*Ha * 0.25
B: OIII

SCNR
Brighten SII a bit and apply SII as mask (this protects the OIII/blue data)
LRGBCombination to add SII as luminance channel (keeping SII mask)
Unsharp Mask (keeping SII mask)
Curves Transformation
Export as TIFF
Topaz DeNoise
Slight color correction in Photoshop
Return to PixInsight
PixelMath to screen RGB stars: ~(~stars * ~$T)
Crop to detail

Northeast Imagers
Mid-Hudson Astronomical Association (MHAA)

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	6826613
PixInsight job	04F7EF23S39D6SHHKEW3L88Z6DLSN0PL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h08m45s.481
RA (top/left)	06h09m36s.667
RA (top/right)	06h08m14s.820
RA (bottom/right)	06h07m54s.337
RA (bottom/left)	06h09m16s.990

Dec (center)	+15°39′13″.90
Dec (top/left)	+15°42′03″.87
Dec (top/right)	+15°49′28″.84
Dec (bottom/right)	+15°36′21″.74
Dec (bottom/left)	+15°28′56″.47

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Contribution Index (beta):

Lower's Nebula (detail)

Lower's Nebula (detail)

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Description

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Image Index:

Contribution Index (beta):

Lower's Nebula (detail)

Lower's Nebula (detail)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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