Our galactic big sister in HaLRGB (Ian McIntyre)

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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Our galactic big sister in HaLRGB

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Our galactic big sister in HaLRGB

By far my largest block of integrated data at over 42 minutes. The largest portion was is the acquisition of the HA data. Data size was such that my computer's 64gb of memory was not enough to integrate each channel with Pixinsight's Weighted Batch Pre-processing. I had to revert to Deep Sky Stacker, which was fine except for having to move files between my Linux and Windows drives. I have learned since this stack that the integration phase of WBPP can be skipped and done later with the individual integration process where the data block size can be lowered.

Still learning big important lessons. Like just because a certain gain has the lowest SNR for your camera, it does not mean it is optimal for all applications. Also, its time to put electronic focus on my scopes. Threw away quite a bit of subframes due to lost focus; probably should have tossed more because I am less than pleased with the fuzzy stars and the concentric rings due to the different size stars in each channel. Also learning the ins and outs of throttling the channels during integration.

I did not feel like taking the time to separate all the dates in the acquisition details, but this data came from 10 different nights in September.

Pacific Northwest Astrophotographers
Askar Telescopes
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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
Deep sky
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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
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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.
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Status	Advanced success
Started	...
Astrometry.net job	8606845
PixInsight job	ANAQRQRSOOKFJKOWK4CPEN6VC1302CS8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h42m53s.206
RA (top/left)	00h47m25s.247
RA (top/right)	00h49m02s.856
RA (bottom/right)	00h38m07s.237
RA (bottom/left)	00h36m59s.404

Dec (center)	+41°15′51″.85
Dec (top/left)	+39°37′04″.33
Dec (top/right)	+42°43′28″.68
Dec (bottom/right)	+42°53′45″.15
Dec (bottom/left)	+39°47′04″.84

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Our galactic big sister in HaLRGB

Our galactic big sister in HaLRGB

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Our galactic big sister in HaLRGB

Our galactic big sister in HaLRGB

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