M33 (Gary Imm) - AstroBin

M33

This object is the 2nd closest spiral galaxy to earth, approximately 3 million light-years away in the constellation of Triangulum. It is the third-largest member of our Local Group of galaxies, second only to our Milky Way and the Andromeda Galaxy. This galaxy has a diameter of about 60,000 light years and is estimated to contain 40 billion stars.

Because this galaxy is so close to us, the full resolution view shows many interesting objects within this galaxy. Star clusters, HII regions, and even nebulae are easy to see. I like the many colorful bright orange and blue stars scattered throughout the disk, as well as the numerous dark dust lanes spiraling in towards the core. The core of this galaxy is surprisingly diffuse.

Some of the highlights of this galaxy for me are described below. The Astrobin mouseover is useful is identifying these objects.

NGC 604 is the largest reddish region in the upper right of the galaxy. This is a region of starbirth so big that the Space Telescope Science Institute described it as "monstrous", with the second largest number of young stars of any region in our Local Galaxy Group. Radiation pumping out from the young stars floods into the gas in the region, giving it a reddish glow.

IC 132 is the large blue nebula located on the lower right edge of the disk. There are 3 of these incredible blue nebula across the bottom of the disk: IC 132, NGC 588 at the bottom center of the disk, and [MJ98] WR 15 on the bottom left edge of the disk.

My favorite area of nebulosity is IFM-B 1940, on the upper right side of the disk. It looks like a red “6”, with a tiny circle of blue stars in the lower half of it.

I also annotated, in yellow, the 10 brightest globular star clusters in M33.

Final
Original
I

Takahashi Refractors
ASI 6200 MM Pro
The refractors!
Cloudy Nights
Texas Astronomy

Globular Clusters (Extragalactic)

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Status	Advanced success
Started	...
Astrometry.net job	5386203
PixInsight job	J5X1QKY5IZHUJ9XDJXOGRVLVDM91KXW2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m52s.892
RA (top/left)	01h35m29s.577
RA (top/right)	01h35m38s.606
RA (bottom/right)	01h32m15s.770
RA (bottom/left)	01h32m08s.353

Dec (center)	+30°39′39″.91
Dec (top/left)	+30°06′28″.40
Dec (top/right)	+31°11′40″.40
Dec (bottom/right)	+31°12′48″.33
Dec (bottom/left)	+30°07′36″.53

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M33

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