Moon phase on October 25, 2009

First Quarter, 50%
🌓 First Quarter
Sunday, October 25, 2009 · at noon (Brasília)
Illumination: 50% Age: 7.4 days Cycle: 25%
Home → Moon phase → October 25, 2009

On Sunday, October 25, 2009 the Moon was in its first quarter phase, with 50% of its disk illuminated and an age of 7.4 days since the last new moon. Half of the disk is lit, about a week after the new moon. The Moon is easy to see in the early evening and sets around midnight.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌓 First Quarter
Illumination50%
Moon age7.4 days
Day of the weekSunday
Last new moonOctober 18, 2009 at 03:33
Next full moonNovember 2, 2009 at 17:14 (in 8.2 days)
Next new moonNovember 16, 2009 at 17:14 (in 22.2 days)

The Moon on the surrounding days

Compare the phase and illumination over the three days before and after. Click a day to open its page.

ThuOct 22Waxing Crescent, 20%20%Waxing CrescentFriOct 23Waxing Crescent, 29%29%Waxing CrescentSatOct 24Waxing Crescent, 39%39%Waxing Crescent
SunOct 25First Quarter, 50%50%First Quarter
MonOct 26First Quarter, 60%60%First QuarterTueOct 27Waxing Gibbous, 70%70%Waxing GibbousWedOct 28Waxing Gibbous, 79%79%Waxing Gibbous

← October 24, 2009 October 26, 2009 →

About the first quarter

Half of the disk is lit, about a week after the new moon. The Moon is easy to see in the early evening and sets around midnight. The phase name comes from the Moon's position in its 29.53-day cycle: on October 25, 2009 it had completed 25% of the cycle that began with the new moon on October 18, 2009.

Looking for another date, such as a birthday? Use the Moon phase on the day I was born tool, see the Moon phase today page with the lunar calendar, or find the day of the week of October 25, 2009. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on October 25, 2009?

On October 25, 2009 the Moon was in its first quarter phase, with 50% of the disk lit (calculated at noon Brasília time).

How old is the Moon on that date?

The age is the time since the last new moon: 7.4 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after October 25, 2009 falls on November 2, 2009 at 17:14 Brasília time.

When is the next new moon after that date?

The next new moon after October 25, 2009 falls on November 16, 2009 at 17:14 Brasília time.

How is the Moon phase calculated?

With Jean Meeus's astronomical formulas for the instants of new, quarter and full moon. The age comes from the time since the last new moon and the illumination is (1 − cos(2π × cycle fraction)) / 2.

Is the phase the same everywhere in the world?

Yes, the phase and the illuminated percentage are the same across the planet at any given instant. Only the orientation changes: in the southern hemisphere a waxing Moon is lit on the left, in the northern one on the right.