Lunar Visibility

First-crescent forecast · Yallop q + Odeh V

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Or click anywhere on the map to check that spot.

Yallop zones

Map overlay uses sea-level geometry at each cell's best time. The point result uses your entered elevation.

Method and observing caveats

Uses Yallop q and Odeh V first-crescent criteria at the Yallop best time. Real sightings still depend on haze, horizon transparency, eyesight, observer experience, and knowing exactly where to look.

References: Yallop TN 69, Odeh 2004, IAC Accurate Times.