Moon phase on September 12, 1986

First Quarter, 60%
🌓 First Quarter
Friday, September 12, 1986 · at noon (Brasília)
Illumination: 60% Age: 8.3 days Cycle: 28%
Home → Moon phase → September 12, 1986

On Friday, September 12, 1986 the Moon was in its first quarter phase, with 60% of its disk illuminated and an age of 8.3 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
Illumination60%
Moon age8.3 days
Day of the weekFriday
Last new moonSeptember 4, 1986 at 04:10
Next full moonSeptember 18, 1986 at 02:34 (in 5.6 days)
Next new moonOctober 3, 1986 at 15:55 (in 21.2 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.

TueSep 9Waxing Crescent, 29%29%Waxing CrescentWedSep 10Waxing Crescent, 39%39%Waxing CrescentThuSep 11First Quarter, 50%50%First Quarter
FriSep 12First Quarter, 60%60%First Quarter
SatSep 13Waxing Gibbous, 70%70%Waxing GibbousSunSep 14Waxing Gibbous, 79%79%Waxing GibbousMonSep 15Waxing Gibbous, 87%87%Waxing Gibbous

← September 11, 1986 September 13, 1986 →

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 September 12, 1986 it had completed 28% of the cycle that began with the new moon on September 4, 1986.

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 September 12, 1986. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on September 12, 1986?

On September 12, 1986 the Moon was in its first quarter phase, with 60% 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: 8.3 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after September 12, 1986 falls on September 18, 1986 at 02:34 Brasília time.

When is the next new moon after that date?

The next new moon after September 12, 1986 falls on October 3, 1986 at 15:55 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.