Comet Lemmon (C/2025 A6)
A visitor from the edge of the Solar System, October 2025.
This photograph is also available in the shop as a full-resolution digital file.
Buy in the shopAbout the object
Comet C/2025 A6 (Lemmon) was discovered in January 2025 at the Mount Lemmon observatory in Arizona. In autumn 2025 it came close to both the Sun and the Earth. Its green head is coloured by diatomic carbon glowing in sunlight; the thin straight tail is gas blown away by the solar wind.
How the image was made
- Captured
- 13 October 2025
- Total exposure
- 10 min (10 × 60 s)
- Camera
- ZWO ASI2600MC Pro
- Focal length
- 448 mm
- Mount
- ZWO AM5N
- Location
- Banská Bystrica, Slovakia (home observatory)
- Calibration & stacking
- Siril 1.4.0-beta4
- Processing
- Adobe Lightroom 9.0 (Windows)
Data from the original file’s metadata or from the author.