Lunar Calendar Month December 2018 (Mongolia)

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 Ulan Bator, Mongolia during December 2018.

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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
new moon	2018-12-07	15:20
1st quarter	2018-12-15	19:49
full moon	2018-12-23	01:48
3rd quarter	2018-12-29	17:34

Apogee and perigee of the Moon

The following table shows the dates of perigee and apogee of the Moon during December 2018.

Position	Dates	Time	Distance	Notes
Apogee	2018-12-12	20:27	405,176 km
Perigee	2018-12-24	17:53	361,059 km

Meteor Activity

Active meteor showers this month and their peak days. For more information, see the meteor shower calendar 2018.

Name	Peak Day
Phoenicids	2018-12-02
Puppid-Velids	2018-12-07
Monocerotids	2018-12-09
σ-Hydrids	2018-12-12
Geminids	2018-12-14
Comae Ber.	2018-12-16
Dec. L. Minorids	2018-12-20
Ursids	2018-12-22

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
Venus	2018-12-04 02:42
Saturn	2018-12-09 13:30
Mars	2018-12-15 07:21
Aldebaran	2018-12-21 15:31
Beehive	2018-12-25 12:52
Regulus	2018-12-27 00:06

Illumination of the Moon

The following table depicts the illumination of the Moon, calculated at 00:00, throughtout the 31 days of December 2018.

December 2018
w	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
Week 48	26Monday	27Tuesday	28Wednesday	29Thursday	30Friday	1Saturday 42.7% illuminated Age:22.8	2Sunday 31.9% illuminated Age:23.9
Week 49	3Monday 22.1% illuminated Age:24.9	4Tuesday 13.8% illuminated Age:25.9	5Wednesday 7.3% illuminated Age:27	6Thursday 2.8% illuminated Age:27.9	7Friday 0.4% illuminated Age:28.9	8Saturday 0.1% illuminated Age:0.3	9Sunday 1.8% illuminated Age:1.3
Week 50	10Monday 5.3% illuminated Age:2.2	11Tuesday 10.5% illuminated Age:3.1	12Wednesday 17% illuminated Age:4	13Thursday 24.6% illuminated Age:4.9	14Friday 33.1% illuminated Age:5.8	15Saturday 42.3% illuminated Age:6.7	16Sunday 51.8% illuminated Age:7.6
Week 51	17Monday 61.5% illuminated Age:8.5	18Tuesday 71% illuminated Age:9.4	19Wednesday 79.9% illuminated Age:10.4	20Thursday 87.8% illuminated Age:11.4	21Friday 94.1% illuminated Age:12.5	22Saturday 98.3% illuminated Age:13.5	23Sunday 100% illuminated Age:14.7
Week 52	24Monday 98.8% illuminated Age:15.8	25Tuesday 94.8% illuminated Age:16.9	26Wednesday 88.1% illuminated Age:18.1	27Thursday 79.4% illuminated Age:19.2	28Friday 69.2% illuminated Age:20.3	29Saturday 58.2% illuminated Age:21.4	30Sunday 47.1% illuminated Age:22.4
Week 1	31Monday 36.4% illuminated Age:23.4	1Tuesday	2Wednesday	3Thursday	4Friday	5Saturday	6Sunday
	7Monday	8Tuesday	9Wednesday	10Thursday	11Friday	12Saturday	13Sunday