The Triangulum Galaxy (M33) is a large spiral galaxy in our local group of galaxies that contains the Milky Way, the Andromeda Galaxy, and a bunch of smaller galaxies including the Large and Small Magellanic Clouds. M33 is 2.73 light-years away from us with a diameter of about 60,000 light-years. The pink areas in the galaxy are large emission nebulae associated with star forming regions. The largest of these is toward the upper right and has the astronomical designation NGC 604. I took this photograph in my JaZ 2 Observatory under the very light polluted sky I have to live with (Bortle 8-9).
Photographer: Rick Scott
Date / Time: November 28, 2021 from 8:41 PM to 11:40 PM MST
Telescope: home-made 10" f/4.6 Lurie-Houghton
Mount: Losmandy HGM Titan with Gemini 2
Guiding: ZWO 60280, ZWO ASI120MM Mini, PHD2
Camera: ZWO ASI2600MC Pro controlled with Astro Photography Tools (APT)
Filter: Optolong L-Pro
Exposure: 62 x 120 sec, f/4.6, Gain = 100, Temp = 0C
41 flats, 40 bias, 31 darks
Processed in PixInsight (PI) and Adobe Photoshop (PS) CS6.
Updated: December 4, 2021