Andromeda Galaxy (M31) (Steve Greaves)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224

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Andromeda Galaxy (M31)

Revision title: Dust lanes enhanced using Local Histogram Equalisation

Powered byPixInsight

Andromeda Galaxy (M31)

Revision title: Dust lanes enhanced using Local Histogram Equalisation

Filter = Red, subs = 40, exposure = 180s, binning = 1x1, sensor temperature = -10 degrees
Filter = Green , subs = 40, exposure = 180s, binning = 1x1, sensor temperature = -10 degrees
Filter = Blue , subs = 40, exposure = 180s, binning = 1x1, sensor temperature = -10 degrees
Filter = Lum , subs = 120, exposure = 120s, binning = 1x1, sensor temperature = -10 degrees

Original
C
Final
D

C

Title: Andromeda Galaxy (M31)

Description: Added around 4 hrs of luminance. Spent time on deconvolution to enhance small stars in galaxy arms.

Uploaded: ...

D

Title: Dust lanes enhanced using Local Histogram Equalisation

Description: Used LHE in Pixinsight to enhance the dust lanes. I am just beginning to use this feature and like it a lot. Its easy to over use though. I think this revision looks OK, but you never know!
My LSE settings are:
Kernel radius: 100
Contrast Limit 1.5
Amount: 0.4
Histogram resolution: 8-bit
Circular Kernal
I used real-time preview to tweak the parameters to get the result I liked.

Uploaded: ...

The refractors!
Cloudy Nights

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Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	5409062
PixInsight job	Z5X4IHG24RJBOR9TZ3GT52XINAZQGEXU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m44s.61
RA (top/left)	00h48m22s.28
RA (top/right)	00h49m30s.98
RA (bottom/right)	00h36m48s.71
RA (bottom/left)	00h36m17s.84

Dec (center)	+41°17′33″.4
Dec (top/left)	+39°33′11″.9
Dec (top/right)	+42°54′04″.3
Dec (bottom/right)	+43°00′44″.6
Dec (bottom/left)	+39°39′30″.6

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Contribution Index (beta):

Andromeda Galaxy (M31)

Revision title: Dust lanes enhanced using Local Histogram Equalisation

Andromeda Galaxy (M31)

Revision title: Dust lanes enhanced using Local Histogram Equalisation

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Sky plot

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Image Index:

Contribution Index (beta):

Andromeda Galaxy (M31)

Revision title: Dust lanes enhanced using Local Histogram Equalisation

Andromeda Galaxy (M31)

Revision title: Dust lanes enhanced using Local Histogram Equalisation

Equipment

Acquisition details

Description

Comments

Revisions

C

D

Sky plot

Histogram

In these public groups

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