Atm extinction eclipse
Taken by Lorenzo Comolli on August 12, 2026 @
Villahoz, Spain
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Details:
This eclipse was very low above the horizon (8.2° at my location), so I tried to measure the atmospheric extinction based on the brightness of the solar disk during partial phases. I measured a value of 3.7 EV during totality, which is much higher than what I expected (1.4 EV) considering standard extinction models and the extinction I had measured at my home location the month before with the Sun at the same altitude. The haze that day was probably particularly heavy, though fortunately without any unsightly linear gradients that would have affected the totality imaging. The ability to capture so many stars down to magnitude 12 is therefore even more incredible..
Photographer's website:
https://comolli.astrosurf.com/ecl26a.htm
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