Lunar Calendar Month December 2023 (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 December 2023.

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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
3rd quarter	2023-12-05	15:49
new moon	2023-12-13	09:32
1st quarter	2023-12-20	04:39
full moon	2023-12-27	10:33

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during December 2023.

Position	Dates	Time	Distance	Notes
Apogee	2023-12-05	04:44	404,347 km
Perigee	2023-12-17	04:54	367,899 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
Pollux	2023-12-01 13:23
Beehive	2023-12-02 14:21
Spica	2023-12-09 00:05
Venus	2023-12-10 02:53
Saturn	2023-12-18 07:58
Jupiter	2023-12-23 00:20
Pleiades	2023-12-24 17:37
Pollux	2023-12-28 21:51
Beehive	2023-12-29 22:45

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of December 2023.

December 2023
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 48	27 Monday	28 Tuesday	29 Wednesday	30 Thursday	1Friday 89.1% illuminated Age: 17.9	2Saturday 82.2% illuminated Age: 18.9	3Sunday 74.2% illuminated Age: 19.8
Week 49	4Monday 65.5% illuminated Age: 20.7	5Tuesday 56.3% illuminated Age: 21.6	6Wednesday 46.9% illuminated Age: 22.4	7Thursday 37.5% illuminated Age: 23.3	8Friday 28.5% illuminated Age: 24.2	9Saturday 20.1% illuminated Age: 25.2	10Sunday 12.7% illuminated Age: 26.1
Week 50	11Monday 6.7% illuminated Age: 27.1	12Tuesday 2.4% illuminated Age: 28.1	13Wednesday 0.2% illuminated Age: 29.1	14Thursday 0.5% illuminated Age: 0.6	15Friday 3.3% illuminated Age: 1.7	16Saturday 8.7% illuminated Age: 2.8	17Sunday 16.3% illuminated Age: 3.9
Week 51	18Monday 25.7% illuminated Age: 5	19Tuesday 36.4% illuminated Age: 6.1	20Wednesday 47.7% illuminated Age: 7.2	21Thursday 58.9% illuminated Age: 8.2	22Friday 69.7% illuminated Age: 9.3	23Saturday 79.3% illuminated Age: 10.3	24Sunday 87.4% illuminated Age: 11.4
Week 52	25Monday 93.7% illuminated Age: 12.4	26Tuesday 97.8% illuminated Age: 13.4	27Wednesday 99.8% illuminated Age: 14.4	28Thursday 99.7% illuminated Age: 15.3	29Friday 97.5% illuminated Age: 16.3	30Saturday 93.6% illuminated Age: 17.2	31Sunday 88% illuminated Age: 18.1
	1 Monday	2 Tuesday	3 Wednesday	4 Thursday	5 Friday	6 Saturday	7 Sunday
	8 Monday	9 Tuesday	10 Wednesday	11 Thursday	12 Friday	13 Saturday	14 Sunday