Question 1

What phase is the Moon in New York on October 18, 2023?

Accepted Answer

The Moon is First Quarter, 24% illuminated, on lunar day 5. It rises at 12:29 and sets at 21:10.

Question 2

What does 24% 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 October 18, 2023?

Accepted Answer

The Moon is above the horizon for about 8h 40m, from 12:29 to 21:10, reaching at 21° 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 October 18, 2023

First Quarter

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