Lunar Calendar Month August 2028 (Guam)

The Moon is the only natural satellite of the Earth and the fifth largest moon in the Solar System. It is the largest natural satellite in the solar system relative to the size of its planet. The following is information specific for Hagåtña, Guam during August 2028.

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Date and time of moon phases

The information in the following table comes from calculations published by the Astronomical Applications Department of the U.S. Naval Observatory.

Moon phases	Dates	Time
full moon	2028-08-05	18:10
3rd quarter	2028-08-13	21:45
new moon	2028-08-20	20:44
1st quarter	2028-08-27	11:36

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during August 2028.

Position	Dates	Time	Distance	Notes
Apogee	2028-08-08	22:56	405,892 km
Perigee	2028-08-21	14:11	358,073 km

Moon-Planet Conjunctions

A Moon-planet conjunction occurs when an astronomical object has either the same, or nearly the same, right ascension or the same ecliptic longitude of that of the Moon, as observed from Earth.

Astronomical Objects	Date and Time
Pleiades	2028-08-14 14:12
Venus	2028-08-17 12:17
Mars	2028-08-18 04:48
Mercury	2028-08-22 14:46
Antares	2028-08-27 21:09

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of August 2028.

August 2028
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 31	31 Monday	1Tuesday 78.8% illuminated Age: 10.3	2Wednesday 86.6% illuminated Age: 11.2	3Thursday 92.8% illuminated Age: 12.2	4Friday 97.1% illuminated Age: 13.1	5Saturday 99.5% illuminated Age: 14.1	6Sunday 99.9% illuminated Age: 15
Week 32	7Monday 98.5% illuminated Age: 15.9	8Tuesday 95.4% illuminated Age: 16.8	9Wednesday 90.6% illuminated Age: 17.7	10Thursday 84.4% illuminated Age: 18.6	11Friday 76.9% illuminated Age: 19.5	12Saturday 68.3% illuminated Age: 20.4	13Sunday 59% illuminated Age: 21.3
Week 33	14Monday 49.1% illuminated Age: 22.2	15Tuesday 39% illuminated Age: 23.2	16Wednesday 29% illuminated Age: 24.2	17Thursday 19.6% illuminated Age: 25.2	18Friday 11.4% illuminated Age: 26.3	19Saturday 5.1% illuminated Age: 27.4	20Sunday 1.1% illuminated Age: 28.5
Week 34	21Monday 0% illuminated Age: 0.2	22Tuesday 2% illuminated Age: 1.3	23Wednesday 6.9% illuminated Age: 2.5	24Thursday 14.3% illuminated Age: 3.6	25Friday 23.5% illuminated Age: 4.8	26Saturday 33.9% illuminated Age: 5.8	27Sunday 44.7% illuminated Age: 6.9
Week 35	28Monday 55.4% illuminated Age: 7.9	29Tuesday 65.6% illuminated Age: 8.9	30Wednesday 74.9% illuminated Age: 9.8	31Thursday 83% illuminated Age: 10.8	1 Friday	2 Saturday	3 Sunday
	4 Monday	5 Tuesday	6 Wednesday	7 Thursday	8 Friday	9 Saturday	10 Sunday
	11 Monday	12 Tuesday	13 Wednesday	14 Thursday	15 Friday	16 Saturday	17 Sunday