M31: 2023 Version (Ginungagap42)

Celestial hemisphere: Northern · Constellation: Andromeda (And) · Contains: 35 And · 35 nu. And · Andromeda Galaxy · HD3765 · HD3969 · HD4143 · HD4174 · HD4322 · HD4501 · HD4669 · M 110 · M 31 · M 32 · NGC 205 · NGC 206 · NGC 221 · NGC 224 · The star ν And

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M31: 2023 Version

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M31: 2023 Version

So this is my first project with the "new" setup: A Mele mini-PC running NINA vs the ASIAir Plus. I ran into several "pilot error" issues due to the switch. First, the default value for camera offset was 10 as opposed to 50 in the ASIAir. This is probably a sensible default value, but not for the ASI1600MM. My noise floor was too low and therefore when I subtracted my library darks from my LRGB data I had lots of frames that had zero pixel values. I ended up reshooting my darks at offset 10, which cleared up the LRGB, which was all shot at 0 gain. Then the Hydrogen alpha problems started. I was seeing wicked walking noise in one frame, but not the other. The default dither value in NINA is 10 pixels. I upped this to 25 pixels to try to eliminate the fixed pattern noise from the 1600MM. I set up a run, and reshot the problem frame. However, after the six shots I validated before going to bed, the filter wheel stopped communicating with the rest of the system (I am looking into 2.4GHz wifi interference with USB, because apparently that is a real thing). Anyway, it turns out that since I shot the Ha at 139 gain, just shooting new darks was not sufficient. I had to reshoot new flats and dark flats. Once that was done, I properly calibrated out the fixed pattern noise.

This has definitely been a learning experience!

Now that my default values have been set properly, I might try to add more data. Or not. We have a tropical storm going through today and tomorrow, and it's supposed to rain for the next week or so.

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Description: Minor tweaks to color and contrast.

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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	8497719
PixInsight job	8T7L1LHIZ8MV5H5S4KMNF9201U4SUXPD
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m54s.89
RA (top/left)	00h50m56s.82
RA (top/right)	00h46m54s.88
RA (bottom/right)	00h34m49s.90
RA (bottom/left)	00h39m04s.55

Dec (center)	+41°16′38″.8
Dec (top/left)	+40°59′30″.1
Dec (top/right)	+42°37′29″.6
Dec (bottom/right)	+41°31′43″.3
Dec (bottom/left)	+39°55′17″.5

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M31: 2023 Version

M31: 2023 Version

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Image Index:

Contribution Index (beta):

M31: 2023 Version

M31: 2023 Version

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