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🌙 Moon Phase & Hilal (Crescent) Visibility

Moon phase, age, illumination, altitude/azimuth, elongation and moonset lag, next new moon (conjunction) and crescent visibility estimates using the Odeh and Yallop criteria.

How to use

  1. Set your location and date.
  2. See moon data at sunset.
  3. Check the next conjunction and the visibility estimate for the following evenings.

FAQ

Is this an official moon sighting?

No. It is an astronomical estimate, not an official sighting; follow your local authority.

What are the Odeh and Yallop criteria?

Scientific criteria comparing the moon's altitude above the sun (ARCV) with crescent width (W) to estimate naked-eye or optical visibility.