Question 1

What phase is the Moon in New York on May 21, 2024?

Accepted Answer

The Moon is Full Moon, 99% illuminated, on lunar day 15. It rises at 19:44 and sets at 05:09.

Question 2

What does 99% 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 21, 2024?

Accepted Answer

The Moon is above the horizon for about 9h 26m, from 19:44 to 05:09, reaching at 26° 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 21, 2024

Full Moon

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