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  ·  PGC 1916717  ·  PGC 1928851  ·  PGC 3084774  ·  PGC 3084776  ·  PGC 3084777  ·  PGC 3084782  ·  PGC 3089041  ·  PGC 3095531  ·  PGC 5899  ·  Triangulum Galaxy  ·  Triangulum Pinwheel
Getting plate-solving status, please wait...
M33, 



    
        

            Gary Imm
M33, 



    
        

            Gary Imm

M33

Getting plate-solving status, please wait...
M33, 



    
        

            Gary Imm
M33, 



    
        

            Gary Imm

M33

Acquisition details

Dates:
Aug. 13, 2020 ·  Aug. 14, 2020
Frames:
Chroma Blue: 30×120(1h) (gain: 0.00) -5°C bin 1×1
Chroma Green: 30×120(1h) (gain: 0.00) -5°C bin 1×1
Chroma Lum: 60×120(2h) (gain: 0.00) -5°C bin 1×1
Chroma Red: 30×120(1h) (gain: 0.00) -5°C bin 1×1
Integration:
5h
Avg. Moon age:
24.27 days
Avg. Moon phase:
28.30%

RA center: 01h33m52s.892

DEC center: +30°3939.91

Pixel scale: 0.773 arcsec/pixel

Orientation: 91.480 degrees

Field radius: 0.654 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 5063x3379

File size: 15.8 MB

Data source: Backyard

Description

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.

Comments

Revisions

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    M33, 



    
        

            Gary Imm
    Original
  • M33, 



    
        

            Gary Imm
    I

Sky plot

Sky plot

Histogram

M33, 



    
        

            Gary Imm