Moon phase on February 13, 2001

Waning Gibbous, 73%
🌖 Waning Gibbous
Tuesday, February 13, 2001 · at noon (Brasília)
Illumination: 73% Age: 20.0 days Cycle: 67%
Home → Moon phase → February 13, 2001

On Tuesday, February 13, 2001 the Moon was in its waning gibbous phase, with 73% of its disk illuminated and an age of 20.0 days since the last new moon. The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌖 Waning Gibbous
Illumination73%
Moon age20.0 days
Day of the weekTuesday
Last new moonJanuary 24, 2001 at 11:07
Next full moonMarch 9, 2001 at 14:24 (in 24.1 days)
Next new moonFebruary 23, 2001 at 05:22 (in 9.8 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.

SatFeb 10Waning Gibbous, 95%95%Waning GibbousSunFeb 11Waning Gibbous, 89%89%Waning GibbousMonFeb 12Waning Gibbous, 82%82%Waning Gibbous
TueFeb 13Waning Gibbous, 73%73%Waning Gibbous
WedFeb 14Waning Gibbous, 64%64%Waning GibbousThuFeb 15Last Quarter, 53%53%Last QuarterFriFeb 16Last Quarter, 43%43%Last Quarter

← February 12, 2001 February 14, 2001 →

About the waning gibbous

The lit part starts to shrink. The Moon rises a few hours after dusk and is still in the sky when day breaks. The phase name comes from the Moon's position in its 29.53-day cycle: on February 13, 2001 it had completed 67% of the cycle that began with the new moon on January 24, 2001.

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 February 13, 2001. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on February 13, 2001?

On February 13, 2001 the Moon was in its waning gibbous phase, with 73% 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: 20.0 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after February 13, 2001 falls on March 9, 2001 at 14:24 Brasília time.

When is the next new moon after that date?

The next new moon after February 13, 2001 falls on February 23, 2001 at 05:22 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.