I dragged myself outside this morning to get pictures of Comet C/2025 A6 (Lemmon) around 6 am MDT. One of those pictures is in the previous post. That is likely the last time, because as the comet gets closer to the sun the sky is getting too bright by the time it rises above the distant ridgeline. In the evening, the comet is still easily visible above Bristol Head as darkness falls and is very near its expected peak brightness of magnitude 4. That is naked-eye brightness, but it is much better observed with binoculars.
For a change of pace, this evening I used a Sony A7iii camera with a Nikon 180mm f/2.8 ED Ai-s lens.
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| Comet C/2025 A6 (Lemmon) over Bristol Head. 7:50 pm MDT 20 Oct. |
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| Comet Lemmon. 8:00 pm MDT 20 Oct. |
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| Comet C/2025 R2 (SWAN). 8:05 pm MDT 20 Oct |
The name "Lemmon" derives from the Mount Lemmon Observatory in the Santa Catalina Mountains. The name "SWAN" derives from the Solar Wind Anisotropies (SWAN) instrument on the ESA Solar and Heliospheric Observatory (SOHO) spacecraft.
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