M33 Triangulum Galaxy (Jeff Weiss)

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: HD9483 · 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 · Triangulum Pinwheel

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M33 Triangulum Galaxy

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M33 Triangulum Galaxy

M33, Triangulum Galaxy, is a beautiful large near-face-on spiral galaxy (54 deg tilt) located in the constellation of Triangulum. With a diameter of about 60,000 light-years, the Triangulum galaxy is the third largest member of the Local Group of galaxies, roughly 60% the size of the Milky Way. It may be a gravitationally bound companion of the Andromeda Galaxy, as it is heading toward that galaxy. At 2.9 MLY distance, Triangulum has 40 billion stars, compared to 400 billion for the Milky Way, and 1 trillion stars for Andromeda Galaxy (other members of the Local Group). The M33 nucleus does not appear to contain a supermassive black hole with an upper limit of 3,000 solar masses based on the motion of stars in its core. Its dark matter component is estimated to be 5x its baryonic matter component. [based on Wikipedia]

M33 was one of the original SA-type galaxies (after M31) whose flattening gravitational rotation curves (velocity vs. radius) were measured using the velocities of its multiple HII regions by V. Rubin and WK Ford (~1970) at Mt. Palomar. This was eventually interpreted (P.Peebles and J. Ostriker, 1973) as due to halos of dark matter surrounding the galaxies of roughly 5x the galaxies' visible matter.

This 13.5h LRGB image uses DeepSkyWest (NM) data collected between 10/20/20 and 12/8/20. North is to the Right.

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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
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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
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Professional, scientific grade data
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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	6562546
PixInsight job	LZT3KOCY6B1O2BS1T6DG8RS9G6HCE33L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m52s.27
RA (top/left)	01h35m54s.15
RA (top/right)	01h35m43s.91
RA (bottom/right)	01h31m48s.93
RA (bottom/left)	01h32m02s.30

Dec (center)	+30°39′21″.2
Dec (top/left)	+30°04′52″.8
Dec (top/right)	+31°15′29″.6
Dec (bottom/right)	+31°13′41″.9
Dec (bottom/left)	+30°03′07″.1

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M33 Triangulum Galaxy

M33 Triangulum Galaxy

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M33 Triangulum Galaxy

M33 Triangulum Galaxy

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