Capturing Cosmic Neighbors: Messier 81 and 82 Over Four Years
As astrophotographers, we often strive to push the boundaries of what we can capture, refining our techniques and equipment over time. This incredible image of Messier 81 (Bode's Galaxy) and Messier 82 (Cigar Galaxy) is a testament to that dedication, meticulously assembled over a span of four years.
This ambitious project involved two distinct imaging sessions, each with its own unique setup, utilizing the same high-performance ZWO 6200MC Pro camera. This allows for a fascinating comparison and highlights the subtle yet significant improvements that can be made through careful planning and execution.
Setup 1 (2021)
During the initial phase of this project in 2021, the following equipment was employed:
- Telescope: TS-Optics 130APO, with a focal length of 910mm at f/7.
- Mount: Skywatcher EQ6-R Pro, providing stable tracking for long exposures.
- Filter: Optolong L-Pro, which helps to reduce light pollution and enhance the contrast of nebulae and galaxies.
Setup 2 (2025)
In a more recent session, the setup was updated to leverage newer technology:
- Telescope: Askar 103APO, a capable instrument for deep-sky imaging.
- Mount: ZWO AM5N, known for its portability and precise tracking.
- Filter: Antlia Triband RGB, designed to capture specific wavelengths of light for vibrant color.
Acquisition and Processing
Across both setups, a total of 60 exposures of 240 seconds each (with the L-Pro filter) and 70 exposures of 300 seconds each (with the Antlia Triband RGB filter) were acquired. The acquisition software used was NINA, a popular choice for its comprehensive control over the imaging process.
Post-processing was handled with the industry-standard tools of PixInsight and Photoshop, where the vast amount of data was meticulously combined, calibrated, and enhanced to reveal the stunning details of these magnificent galaxies.
