M33 Triangulum Galaxy (Joe Niemeyer)

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: M 33 · NGC 595 · NGC 598 · NGC 604 · Triangulum Galaxy · Triangulum Pinwheel

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M33 Triangulum Galaxy

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M33 Triangulum Galaxy

The Triangulum Galaxy (M33) is the third largest galaxy in the Local Group of galaxies that also includes our Milky Way and the Andromeda Galaxy. This magnificent face-on spiral galaxy is located 2.7 million light-years from us in the constellation Triangulum which is adjacent to the constellation Andromeda. It is fairly bright at magnitude 5.7 and some claim that Triangulum is naked eye visible under ideal viewing conditions. My tired old eyes cannot resolve it, but thank goodness for my trusty telescope.

M33 is about 60,000 light years wide and thus about 60 percent of the size of the Milky Way. However, it contains only about 40 billion stars compared to perhaps 400 billion in our galaxy. Below and left of the core you can see a bright red emission nebula cataloged as NGC 604. This nebula is incredibly large at 1,500 light-years across. Several other emission nebulae can be seen in this image as well. Unlike the Milky Way and Andromeda, Triangulum does not have a supermassive black hole at its center. Galaxies require a large central bulge, which Triangulum lacks, in order to form a supermassive black hole.

I used the best of fifty 180-second exposures shot through my Baader Neodymium filter at 1630mm focal length (0.7X Reducer). I then calibrated these light frames with 20 each dark, flat, and dark flat frames. I stacked the frames with Astro Pixel Processor and post-processed with Photoshop utilizing the StarXTerminator and Topaz DeNoise AI plugins.

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	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
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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
Backyard
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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	Basic success
Started	...
Astrometry.net job	5342878
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M33 Triangulum Galaxy

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