M101 - The Pinwheel Galaxy (robo9981)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 101 · NGC 5455 · NGC 5457 · NGC 5461 · NGC 5471 · NGC 5477

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M101 - The Pinwheel Galaxy

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M101 - The Pinwheel Galaxy

379x120s = 12.6 hours L

60x120s = 2 hours each R/G/B

All from B7

Total of 18.6 hours of integration time

C8 w/ 0.63x reducer | CEM40 | ASI1600MM-Pro | ZWO LRGB

The underlying data from the C8 benefitted from a few nights of good seeing. Data is still a bit soft, but that's just what I get to live with for trying to push 0.63"/pixel in my skies.

Processing was pretty standard overall

Preprocessing

* Calibration using WBPP

* SubframeSelector

* StarAlignment

* ImageIntegration

* Drizzle (2x, vark 1.5, dropshrink 0.7)

L Channel

A superlum was created by integrating R, G, B, and L using ImageIntegration with NoiseEvaluation for weighting.

* Crop

* DBE

* Deconvolution

* MMT for sharpening

* IntegerResample to bring back to original pre-drizzle resolution

* TGVDenoise

* MMTDenoise

* HistogramTransformation for stretch

* One round of DBE for some lingering gradients

* FastRotation for a more natural angle

* MMT for some final denoise

R/G/B Channels

* DynamicCrop

* DBE

* BackgroundNeutralization

* ColorCalibration

* IntegerResample to pre-drizzle size

* TGVDenoise

* MMTDenoise

* HistogramTransformation

* FastRotation

* LRGBCombination with L channel (Chrominance Denoise enabled)

* Invert + SCNR on stars to remove magenta artifacts

* Curves

* MLT for some final sharpening & denoise

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	Basic success
Started	...
Astrometry.net job	4469038
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M101 - The Pinwheel Galaxy

M101 - The Pinwheel Galaxy

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Sky plot

Histogram

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Image Index:

Contribution Index (beta):

M101 - The Pinwheel Galaxy

M101 - The Pinwheel Galaxy

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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