Messier 33 (Triangulum Galaxy) from my own backyard and remote

This is an object, I imaged several times during the years. The latest image is from a data set I obtained from the remote observatory Deep Sky West with telescopes in Chile and New Mexico. The image shows the Triangulum galaxy Messier 33, located in the constellation Triangulum.

Data calibration and registration and the final processing was done with PixInsight.

In the image you can find very many quasars. I only show the two most distant:

• SDSS J013129.18+311804.8 with a redshift of 3.341 an apparent mag_v of 20.5
• SDSS J013554.70+301251.3 with a redshift of 3.059 an apparent mag_v of 20.65

---

Here is an overview of the used equipment and the exposure times:

• Date: 2018
• Location: Rowe, New Mexico
• Telescope/Lense: Astro Physics RH305
• Focal length [mm]: 1159
• Focal ratio: 3.8
• Mount: Paramount ME
• Camera: SBIG STX 16803
• Autoguiding: Off-Axis with ZWO Asi 120 MM Mini
• Filter: L:R:G:B:Hα:[OIII]
• Exposure time [min]: 420:220:170:160:360:480
• Resolution: 1.66″/px

---

Back in 2012, I photographed Messier 33 from my own backyard.
After calibrating and registering the data in DeepSkyStacker and processing the data in PixInsight, I obtained the following image:

---

Here is an overview of the used equipment and the exposure times:

• Date: 2012
• Location: Krefeld
• Telescope/Lense: TS 10″ Newton
• Focal length [mm]: 1140
• Focal ratio: 4.5
• Mount: Skwatcher NEQ6
• Camera: Canon 500Da
• Filter: OSC
• Exposure time [min]: 108
• Resolution: 0.85″/px

---

In 2009, I captured images of Messier 33 from my own backyard. I carried out the data calibration and registration in DeepSkyStacker and the final processing using PixInsight. The resulting image looked like this:

---

Here is an overview of the used equipment and the exposure times:

• Date: 2009
• Location: Krefeld
• Telescope/Lense: 8″ GSO Newton
• Focal length [mm]: 800
• Focal ratio: 4
• Mount: Skywatcher NEQ6
• Camera: Canon 300 Da
• Autoguiding: no
• Filter: OSC
• Exposure time [min]: 180
• Resolution: 2.94″/px

---

Back in 2007, I photographed Messier 33 again from my backyard.
After calibrating and registering the data in DeepSkyStacker, I completed the final processing in PixInsight. Here’s the result:

---

Here is an overview of the used equipment and the exposure times:

• Date: 2007
• Location: Krefeld
• Telescope/Lense: Pentax 75
• Focal length [mm]: 500
• Focal ratio: 6.7
• Mount: Vixen GP-DX
• Camera: Canon 300 Da
• Autoguiding: no
• Filter: OSC
• Exposure time [min]: 64
• Resolution: 3.4″/px

---

Back in 2005, I photographed Messier 33 for the very first time from my backyard.
After calibrating and registering the data in DeepSkyStacker, I completed the final processing in PixInsight. Here’s the result:

---

Here is an overview of the used equipment and the exposure times:

• Date: 2005
• Location: Krefeld
• Telescope/Lense: Pentax 75
• Focal length [mm]: 500
• Focal ratio: 6.7
• Mount: Vixen GP-DX
• Camera: Canon 300 Da
• Autoguiding: no
• Filter: OSC
• Exposure time [min]: 5
• Resolution: 3.76″/px

---