December

For terms in boldface, see Astronomical Terms.
DayPhenomenonHour
1LAST QUARTER1300
1Saturn is 2° north of the Moon.1300
6Venus is 7° north of the Moon.0100
6The Moon is at apogee.1700
9NEW MOON1800
12Vesta, the third-largest asteroid, is 0° 4' north of the Moon. Occultation of Vesta by the Moon.2100
14Neptune is 0° 7' north of the Moon. Occultation of Neptune by the Moon.1800
16Pallas, the second-largest asteroid, is 1° 0' south of the Moon. Occultation of Pallas by the Moon.0100
16Uranus is 2° south of the Moon.1800
17FIRST QUARTER1000
17Mercury is in superior conjunction.1500
19Mars is at its closest approach.0000
20Saturn appears to be motionless in the sky as it goes from direct motion to retrograde motion.1200
21Pluto is in conjunction with the Sun.0000
22Solstice.0600
22The Moon is at perigee.1000
23Jupiter is in conjunction with the Sun.0600
24FULL MOON0100
24Mars is 0° 9' south of the Moon. Occultation of Mars by the Moon.0300
24Mars is at opposition.2000
28Regulus, the brightest star in the constellation Leo, is 0° 6' north of the Moon. Occultation of Regulus by the Moon.0500
28Saturn is 3° north of the Moon.2200
31LAST QUARTER0800