Lunar Calendar Month December 2023 (Heard Island And McDonald Islands)

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 Heard Island Central Terrotory, Heard Island and McDonald Islands 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	10:49
new moon	2023-12-13	04:32
1st quarter	2023-12-19	23:39
full moon	2023-12-27	05:33

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	2023-12-04	23:44	404,347 km
Perigee	2023-12-16	23:54	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 08:23
Beehive	2023-12-02 09:21
Spica	2023-12-08 19:05
Venus	2023-12-09 21:53
Saturn	2023-12-18 02:58
Jupiter	2023-12-22 19:20
Pleiades	2023-12-24 12:37
Pollux	2023-12-28 16:51
Beehive	2023-12-29 17:45

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 87.8% illuminated Age: 18.1	2Saturday 80.6% illuminated Age: 19.1	3Sunday 72.5% illuminated Age: 20
Week 49	4Monday 63.6% illuminated Age: 20.9	5Tuesday 54.3% illuminated Age: 21.7	6Wednesday 44.9% illuminated Age: 22.6	7Thursday 35.6% illuminated Age: 23.5	8Friday 26.7% illuminated Age: 24.4	9Saturday 18.5% illuminated Age: 25.4	10Sunday 11.3% illuminated Age: 26.3
Week 50	11Monday 5.6% illuminated Age: 27.3	12Tuesday 1.7% illuminated Age: 28.3	13Wednesday 0% illuminated Age: 29.3	14Thursday 0.8% illuminated Age: 0.9	15Friday 4.2% illuminated Age: 1.9	16Saturday 10.1% illuminated Age: 3	17Sunday 18.1% illuminated Age: 4.1
Week 51	18Monday 27.8% illuminated Age: 5.2	19Tuesday 38.7% illuminated Age: 6.3	20Wednesday 50% illuminated Age: 7.4	21Thursday 61.2% illuminated Age: 8.4	22Friday 71.8% illuminated Age: 9.5	23Saturday 81.1% illuminated Age: 10.5	24Sunday 88.9% illuminated Age: 11.6
Week 52	25Monday 94.7% illuminated Age: 12.6	26Tuesday 98.4% illuminated Age: 13.6	27Wednesday 99.9% illuminated Age: 14.6	28Thursday 99.4% illuminated Age: 15.5	29Friday 96.8% illuminated Age: 16.4	30Saturday 92.5% illuminated Age: 17.4	31Sunday 86.7% illuminated Age: 18.3
	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