Solar Eclipse Timing
Calculate solar eclipse duration and umbral shadow diameter from Moon and Sun distances. Determines eclipse type, angular sizes, and maximum totality duration.
Inputs
Results
Max Totality Duration
110.8 sec
Max Duration
1.85 min
Umbral Shadow Diameter
104.6 km
Eclipse Type
Annular (near-total)
How to Use This Calculator
- Enter the Moon Distance (km) for the date of the eclipse — perigee (356,500 km) produces the longest totality, apogee (406,700 km) results in annular eclipses.
- Enter the Sun Distance (km) for the date — perihelion (147.1 M km) in January slightly increases totality duration.
- Read the Eclipse Type: total when the Moon fully covers the Sun, annular when its angular size is smaller.
- Check Max Totality Duration (sec) and Umbral Shadow Diameter (km) to understand the path width.
- Compare Moon Angular Size and Sun Angular Size (arcmin) — when the Moon's exceeds the Sun's, a total eclipse is possible.
Formula
Duration ≈ shadow_width / shadow_speed; θ = d / DRelated Calculators
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