December 2039 Sky Events

Observer Location:Beijing (39.904°, 116.407°)

Monthly Sky Events Overview

23 sky events total, including 4 moon phases and 0 planetary events.

Daily Sky Events

All times are in local time (Asia/Shanghai)

Group Date Sunrise/Sunset Moonrise/Moonset Moon Phase Sky Events

Planetary outlook

December 2039 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.7
Constellation: Sagittarius
Angular diameter: 4.9"
Status: near inferior conjunction

Observation tip: Very bright, easily visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 16h38m48s
Declination: -21°58'07"

Venus

Excellent
Apparent magnitude: -4.1
Constellation: Scorpius
Angular diameter: 15.1"
Status: near inferior conjunction

Observation tip: Very bright, easily visible to the naked eye; Venus is the brightest planet and is best seen at dusk or dawn

Right ascension: 14h45m30s
Declination: -13°40'54"

Mars

Excellent
Apparent magnitude: -1.3
Constellation: Cancer
Angular diameter: 14.9"
Status: near eastern quadrature

Observation tip: Very bright, easily visible to the naked eye; Its reddish appearance is obvious; it is best observed near opposition

Right ascension: 07h22m36s
Declination: +25°15'53"

Jupiter

Excellent
Apparent magnitude: -2.0
Constellation: Libra
Angular diameter: 36.1"
Status: near eastern quadrature

Observation tip: Very bright, easily visible to the naked eye; Its moons are easy to spot and it is excellent for telescope observing

Right ascension: 12h02m40s
Declination: +01°01'30"

Saturn

Excellent
Apparent magnitude: 0.9
Constellation: Libra
Angular diameter: 17.0"
Status: near eastern quadrature

Observation tip: Visible to the naked eye; Saturn’s rings require a telescope to see clearly

Right ascension: 12h43m19s
Declination: -02°10'07"

Uranus

Fair
Apparent magnitude: 5.5
Constellation: Leo
Angular diameter: 4.0"
Status: near eastern quadrature

Observation tip: Binoculars are recommended; Binoculars or a telescope are recommended

Right ascension: 08h21m06s
Declination: +20°05'23"

Neptune

Fair
Apparent magnitude: 7.7
Constellation: Aries
Angular diameter: 2.3"
Status: near western quadrature

Observation tip: A telescope is required; A telescope is required; Neptune appears blue-green

Right ascension: 01h58m02s
Declination: +10°09'28"

Moon

Excellent
Apparent magnitude: -12.7
Constellation: Sagittarius
Angular diameter: 13011.2"
Status: Moon illumination 0.7%

Observation tip: Moon illumination 0.7%; good for observing lunar surface detail

Right ascension: 16h46m33s
Declination: -22°22'03"