Hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  IC131  ·  IC132  ·  IC133  ·  IC135  ·  IC136  ·  IC137  ·  IC142  ·  IC143  ·  M 33  ·  M33  ·  NGC 598  ·  NGC588  ·  NGC592  ·  NGC595  ·  NGC604  ·  Triangulum galaxy
Getting plate-solving status, please wait...
M33 - 2017, 


            Gary Imm
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M33 - 2017

Getting plate-solving status, please wait...
M33 - 2017, 


            Gary Imm
Powered byPixInsight

M33 - 2017

Imaging telescopes or lenses: Takahashi FSQ-85ED

Imaging cameras: ZWO ASI1600MM-Cool

Mounts: Astro-Physics Mach1GTO

Guiding telescopes or lenses: Orion 60mm Guidescope

Guiding cameras: Orion StarShoot AutoGuider Pro Mono

Software: Main Sequence Software Sequence Generator Pro  ·  PixInsight  ·  Stark Labs PHD2 2.6.3

Filters: Astrodon Ha 31mm 5nm  ·  Astrodon Green 31mm Gen2 I-Series  ·  Astrodon Blue 31mm Gen2 I-Series  ·  Astrodon Lum 31mm Gen2 I-Series  ·  Astrodon Red 31mm Gen2 I-Series

Accessory: ZWO EFW  ·  Feathertouch Focuser Boss II Electronic Focusing Control

Dates:Oct. 28, 2017

Astrodon Blue 31mm Gen2 I-Series: 30x60" (30') (gain: 139.00) -15C bin 1x1
Astrodon Green 31mm Gen2 I-Series: 30x60" (30') (gain: 139.00) -15C bin 1x1
Astrodon Ha 31mm 5nm: 10x300" (50') (gain: 139.00) -15C bin 1x1
Astrodon Lum 31mm Gen2 I-Series: 60x60" (1h) (gain: 139.00) -15C bin 1x1
Astrodon Red 31mm Gen2 I-Series: 30x60" (30') (gain: 139.00) -15C bin 1x1

Integration: 3h 20'

Avg. Moon age: 7.91 days

Avg. Moon phase: 55.58%

Astrometry.net job: 3256576

RA center: 1h 33' 51"

DEC center: +30° 39' 23"

Pixel scale: 1.742 arcsec/pixel

Orientation: -92.304 degrees

Field radius: 1.228 degrees

Resolution: 4224x2816

Locations: Backyard (Mag 20.8 - Bortle 4.5), Onalaska, Texas, United States

Data source: Backyard


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.

Looking closely, especially in the full resolution view, you can see many interesting details. Note the many different color hues of the individual foreground stars, the hundreds of blue star clusters in the galaxy arms, the numerous reddish star forming regions, and the dark dust lanes spiraling in towards the core.

NGC 604, the largest reddish region in the lower left of the image, 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. The young stars are extremely hot, at 72,000 degrees F, and the biggest ones are over 100 times the mass of the sun. Radiation pumping out from the young stars floods into the gas in the region, giving it a reddish glow.


Sky plot

Sky plot


M33 - 2017, 


            Gary Imm

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