How to use the eclipse finder
- Choose the 2027 eclipse you want to check.
- Enter latitude and longitude in decimal degrees.
- Run the calculation and confirm whether that event is visible at the coordinate.
- Read the eclipse type, contact times, obscuration and Sun position.
- For August, continue to Totality Finder or Totality Gain when travel decisions matter.
What changes for an annular eclipse?
An annular eclipse has a central phase, but it is not totality. The Moon does not completely cover the bright solar surface, so the result labels that phase annularity. Proper eclipse viewers remain necessary throughout an annular eclipse.
What each result means
Eclipse type tells you whether the point sees a partial, annular or total eclipse. Obscuration describes the fraction of the Sun's apparent area covered at maximum. Central-phase duration is annularity for February and totality for August. Sun altitude measures how high the Sun is above the horizon, while azimuth gives its compass direction.
Why one city can have more than one eclipse time
A city is not a point. Large urban areas can span enough distance to change contact times and central-phase duration. The difference is especially important near a path edge. Eclipse Wayfinder therefore keeps the calculation coordinate visible instead of presenting one city-wide number as universally exact.
Calculation accuracy and path-edge caution
The local circumstances are calculated with Astronomy Engine and checked against NASA event references. Near a central-path boundary, lunar mountains and valleys can shift the predicted limit. Use an exact coordinate and avoid treating a mathematical edge as a guaranteed observing line.
Sources and safety
Read the methodology, data sources and eclipse eye-safety guide. The February event uses NASA's 2027 annular-eclipse reference; August uses NASA's total-eclipse path and Besselian data.