Pinwheel Galaxy (M 101)
A spiral galaxy seen face-on, 21 million light years away.
This photograph is also available in the shop as a full-resolution digital file.
Buy in the shopAbout the object
The Pinwheel (M101) in Ursa Major lies about 21 million light years away and is around 170,000 light years across – almost twice the size of the Milky Way. The pink knots in its arms are regions where stars are forming right now.
How the image was made
- Captured
- 26 April 2026 (start, several nights)
- Total exposure
- 7 h 39 min (153 × 180 s)
- Camera
- ZWO ASI2600MC Pro
- Focal length
- 897 mm
- Mount
- ZWO AM5N
- Location
- Banská Bystrica, Slovakia (home observatory)
- Calibration & stacking
- Siril 1.4.2-HF1
- Processing
- Adobe Lightroom 9.3 (Windows)
Data from the original file’s metadata or from the author.