M33 (Triangulum Galaxy) (Joel Shepherd)

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: IC 131 · IC 132 · IC 133 · IC 135 · IC 136 · IC 137 · IC 142 · IC 143 · M 33 · NGC 588 · NGC 592 · NGC 595 · NGC 598 · NGC 604 · Triangulum galaxy

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M33 (Triangulum Galaxy)

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M33 (Triangulum Galaxy)

Subject: M33 (Triangulum Galaxy): Located "just" 4 million light years away, Triangulum is roughly half the diameter of the Milky Way and has about a tenth of the stellar mass. The outer regions of the galaxy, particularly the pinkish areas indicating hydrogen concentrations, are likely star-producing regions.

Capture notes: At this time of year, decent weather is fleeting so I limited the capture to 90 minutes per channel and made a synthetic (or augmented) luminance by averaging the individual RGB stacks with the all-luminance stack. Moon was fairly low in the sky for most of the capture and the first night (R and B channels) was very clear.

Processing notes: Other than the synthetic luminance, I used a pretty ordinary LRGB workflow. Color is mostly via PixInsight's PhotometricColorCalibration, with a bit of saturation added by one application of curves.

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	Distinct awarded users	Total awarded images
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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
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Distribution of data sources

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	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.
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	1757228
PixInsight job	AYI8OQOV9NSUYK7CJTYDJHDYZ4CB85RV
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	01h33m55s.50
RA (top/left)	01h31m07s.39
RA (top/right)	01h31m25s.94
RA (bottom/right)	01h36m41s.17
RA (bottom/left)	01h36m27s.73

Dec (center)	+30°38′37″.2
Dec (top/left)	+31°24′14″.0
Dec (top/right)	+29°50′14″.4
Dec (bottom/right)	+29°52′41″.6
Dec (bottom/left)	+31°26′50″.8

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M33 (Triangulum Galaxy)

M33 (Triangulum Galaxy)

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Image Index:

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M33 (Triangulum Galaxy)

M33 (Triangulum Galaxy)

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Sky plot

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