Question 1

What phase is the Moon in New York on May 18, 2025?

Accepted Answer

The Moon is Last Quarter, 59% illuminated, on lunar day 21. It rises at 01:27 and sets at 11:26.

Question 2

What does 59% illumination mean?

Accepted Answer

The share of the Moon's visible disc that is lit by the Sun. 0% is new moon and 100% is full moon. Illumination changes fastest near the quarters and slowest near new and full moon.

Question 3

When can the Moon be seen on May 18, 2025?

Accepted Answer

The Moon is above the horizon for about 9h 59m, from 01:27 to 11:26, reaching at 30° at culmination.

Question 4

How accurate is this moon data?

Accepted Answer

Phase, illumination and moon events are computed from astronomical ephemerides for the city's coordinates and timezone. Moonrise and moonset also depend on the local horizon and elevation.

Moon phase for May 18, 2025

Last Quarter

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