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moon_phase_WaxG_65
September 15
Waxing Gibbous
68%
moon_phase_WaxG_75
September 16
Waxing Gibbous
78%
moon_phase_WaxG_85
September 17
Waxing Gibbous
Illumination: 87%
moon_phase_WaxG_90
September 18
Waxing Gibbous
93%
moon_phase_WaxG_95
September 19
Waxing Gibbous
98%

Moon Phase on: September 17, 2021

On this day the Moon was in a Waxing Gibbous phase. This phase is when the moon is more than 50% illuminated but not yet a Full Moon. The phase lasts about 7 days with the moon becoming more illuminated each day until the Full Moon. During a Waxing Gibbous the moon rises in the east in mid-afternoon and is high in the eastern sky at sunset. The moon is then visible through most of the night sky setting a few hours before sunrise. The word Gibbous first appeared in the 14th century and has its roots in the Latin word "gibbosus" meaning humpbacked.

Visit the September 2021 Moon Phases Calendar to see all the daily moon phase for this month.

Waxing Gibbous Phase

The Waxing Gibbous on September 17 has an illumination of 87%. This is the percentage of the Moon illuminated by the Sun. The illumination is constantly changing and can vary up to 10% a day. On September 17 the Moon is 11.24 days old. This refers to how many days it has been since the last New Moon. It takes 29.53 days for the Moon to orbit the Earth and go through the lunar cycle of all 8 Moon phases.

The 8 Lunar Phases

There are 8 lunar phases the Moon goes through in its 29.53 days lunar cycle. The 4 major Moon phases are Full Moon, New Moon, First Quarter and Last Quarter. Between these major phases, there are 4 minor ones: the Waxing Crescent, Waxing Gibbous, Waning Gibbous and Waning Crescent. For more info on the Moon Cycle and on each phase check out Wikipedia Lunar Phase page.

TODAY'S MOON PHASEtodays moon

Phase Details for - September 17

Phase: Waxing Gibbous
Illumination: 87%
Moon Age: 11.24 days
Moon Angle: 0.53
Moon Distance: 374,815.99 km
Sun Angle: 0.53
Sun Distance: 150,324,037.51 km

Useful Moon Resources


Waxing Gibbous Moonrise and Moonset

WaxG_85. WaxG_85 WaxG_85 moon rise
moon rise up average moon rise
moon rise up Average Mid-phase
moon rise up Average Moon Set