Question 1

What phase is the Moon in New York on August 9, 2025?

Accepted Answer

The Moon is Full Moon, 98% illuminated, on lunar day 17. It rises at 20:55 and sets at 08:29.

Question 2

What does 98% 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 August 9, 2025?

Accepted Answer

The Moon is above the horizon for about 11h 34m, from 20:55 to 08:29, reaching at 42° 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 August 9, 2025

Full Moon

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