M31 - Andromeda Galaxy (Andrew Klinger)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Great Nebula in Andromeda · M 110 · M 31 · M 32 · NGC 205 · NGC 221 · NGC 224

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M31 - Andromeda Galaxy

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M31 - Andromeda Galaxy

Data acquired 11-23-16, 11-28-16, and 11-30-16 in Atoka, OK

Scope: William Optics GT81 w/ 0.8x reducer (382mm focal length at f/4.7)

Mount: Orion Sirius EQ-G

Guidescope: Orion 50mm guidescope

Guiding camera: StarShoot Autoguider

Imaging camera: Canon t3i (unmodified)

ISO800

25x480" lights

16x60" lights for the core

(3hr 36min total integration time)

32x darks

90x flats

200x bias

Processing Details:

PixInsight:

Preparing each subset for combination:

BatchPreProcessing->ImageIntegration->DrizzleIntegration->DynamicCrop->BackgroundNeutralization->ColorCalibration

Combined each subset using HDRComposition

BackgroundNeutralization->Deconvolution->MultiscaleLinearTransform for NR->HistogramTransformation->HDRMultiscaleTransform

Made a copy of image to create a semi-starless version:

Removed stars using a StarMask and several iterations of MultiscaleMediumTransform and MorphologicalTransformation->CurvesTransformation

Photoshop:

Combined the starless version into the image as a luminance layer (40% opacity) using luminosity layer blending style.

PixInsight:

LocalHistogramEqualization->HistogramTransformation->SCNR green->CurvesTransformation for slight saturation boost->ColorSaturation tool for specific saturation boosts of galaxy->one final CurvesTransformation->Resampled to 50% for web posting.

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	2052938
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

M31 - Andromeda Galaxy

M31 - Andromeda Galaxy

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Description

Comments

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Image Index:

Contribution Index (beta):

M31 - Andromeda Galaxy

M31 - Andromeda Galaxy

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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IOTD/TP stats (last [x] days)

Distribution of astrophotographers

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