REDEFINING THE SOLAR RADIUS
Besselian Elements Team
Your guide to Solar Eclipses
Eclipse Maps
Display local circumstances computed using the IQP eclipse computational method that accounts for both the lunar limb, observer site topography, and it relies on an improved value for the eclipse solar radius (i.e. 959.95")
Eclipse App
Download our Countdown App to plan and observe your next eclipses powered by the most accurate computational method
Eclipse Weather
Cloud information and forecast for the 2026 Solar Eclipse path across Spain. A grid of key weather variables — cloud cover at all levels, CAPE, convective rain and line-of-sight clarity, satellite images — updated every day for eclipse time at 18:00 UTC.
Who we are
We are the Besselian Elements Team, passionate eclipse chasers and researchers. We provide accurate eclipse calculations and share our work studying these awe-inspiring phenomena
Eclipse Limits and Centreline are jagged lines
The Eclipse Countdown App Is Now Available on the App Store and Google Play
Eclipse predictions need to be periodically updated
2026 Solar Eclipse in Spain: Real Sky Conditions from Weather Webcams
Average cloud cover over Spain considering cloud shadows
Which clouds can ruin your eclipse view
Publications
