Moon phase on July 17, 2003

Waning Gibbous, 90%
🌖 Waning Gibbous
Thursday, July 17, 2003 · at noon (Brasília)
Illumination: 90% Age: 17.8 days Cycle: 60%
Home → Moon phase → July 17, 2003

On Thursday, July 17, 2003 the Moon was in its waning gibbous phase, with 90% of its disk illuminated and an age of 17.8 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
Illumination90%
Moon age17.8 days
Day of the weekThursday
Last new moonJune 29, 2003 at 15:39
Next full moonAugust 12, 2003 at 01:48 (in 25.6 days)
Next new moonJuly 29, 2003 at 03:53 (in 11.7 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.

MonJul 14Full Moon, 100%100%Full MoonTueJul 15Waning Gibbous, 99%99%Waning GibbousWedJul 16Waning Gibbous, 95%95%Waning Gibbous
ThuJul 17Waning Gibbous, 90%90%Waning Gibbous
FriJul 18Waning Gibbous, 82%82%Waning GibbousSatJul 19Waning Gibbous, 73%73%Waning GibbousSunJul 20Waning Gibbous, 64%64%Waning Gibbous

← July 16, 2003 July 18, 2003 →

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 July 17, 2003 it had completed 60% of the cycle that began with the new moon on June 29, 2003.

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 July 17, 2003. For sun times, check sunrise and sunset.

Frequently asked questions

What is the Moon phase on July 17, 2003?

On July 17, 2003 the Moon was in its waning gibbous phase, with 90% 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: 17.8 days of an average 29.53-day cycle.

When is the next full moon after that date?

The next full moon after July 17, 2003 falls on August 12, 2003 at 01:48 Brasília time.

When is the next new moon after that date?

The next new moon after July 17, 2003 falls on July 29, 2003 at 03:53 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.