Moon phase on December 11, 1998

Last Quarter, 49%
🌗 Last Quarter
Friday, December 11, 1998 · at noon (Brasília)
Illumination: 49% Age: 22.4 days Cycle: 75%

On Friday, December 11, 1998 the Moon was in its last quarter phase, with 49% of its disk illuminated and an age of 22.4 days since the last new moon. Half of the disk is lit again, on the opposite side from the first quarter. The Moon rises around midnight and is visible in the morning.

Moon data for this date

Moon at noon Brasília time (UTC-3)
Phase🌗 Last Quarter
Illumination49%
Moon age22.4 days
Day of the weekFriday
Last new moonNovember 19, 1998 at 02:27
Next full moonJanuary 2, 1999 at 00:50 (in 21.5 days)
Next new moonDecember 18, 1998 at 20:43 (in 7.4 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.

← December 10, 1998 December 12, 1998 →

About the last quarter

Half of the disk is lit again, on the opposite side from the first quarter. The Moon rises around midnight and is visible in the morning. The phase name comes from the Moon's position in its 29.53-day cycle: on December 11, 1998 it had completed 75% of the cycle that began with the new moon on November 19, 1998.

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 December 11, 1998. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on December 11, 1998?

On December 11, 1998 the Moon was in its last quarter phase, with 49% 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: 22.4 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after December 11, 1998 falls on January 2, 1999 at 00:50 Brasília time.

When is the next new moon after that date?

The next new moon after December 11, 1998 falls on December 18, 1998 at 20:43 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.