Andromeda Galaxy, M 31 (Yungshih Lee)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: Andromeda Galaxy · HD3431 · HD3765 · HD3969 · HD4143 · HD4174 · HD4322 · HD4501 · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224

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Andromeda Galaxy, M 31

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Andromeda Galaxy, M 31

I was ready to throw this set of subs away. After stacking and stretching, I realized there was something wrong with the image. There was a big halo that appeared in the upper left corner, taking up about a quarter of the frame. It's probably due to a light leak or headlight shined into the lens. I will have to figure it out later. To save the image I kind of cheated by using starnet++ to isolate the background and fixed it in Photoshop with brute force by using clone stamp and blur tools. Not the most elegant way to process an image, but at least the two night's work did not completely go wasted.

Original
B
Final
D

B

Description: The last iteration was too green, I was told. A few times SCNR did the trick. And the stars are further reduced.

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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	5112017
PixInsight job	ADBIYPZS86TY5IV3EEE7LTMHJ2F1ZJIT
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m52s.21
RA (top/left)	00h46m26s.47
RA (top/right)	00h48m46s.56
RA (bottom/right)	00h39m07s.79
RA (bottom/left)	00h37m10s.22

Dec (center)	+41°15′10″.4
Dec (top/left)	+39°47′34″.6
Dec (top/right)	+42°25′46″.3
Dec (bottom/right)	+42°42′24″.0
Dec (bottom/left)	+40°03′32″.6

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Andromeda Galaxy, M 31

Andromeda Galaxy, M 31

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Image Index:

Contribution Index (beta):

Andromeda Galaxy, M 31

Andromeda Galaxy, M 31

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Description

Comments

Revisions

B

Sky plot

Histogram

In these public groups

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