December 2018 Himmelbegivenheder

Observatørens placering:Beijing (39.904°, 116.407°)

Månedlig oversigt over himmelbegivenheder

19 himmelbegivenheder i alt, inklusive 4 månefaser og 1 planetariske begivenheder.

Daglige himmelbegivenheder

Alle tider er i lokal tid (Asia/Shanghai)

Group Dato Solopgang/Solnedgang Måneopgang/Månenedgang Månefase Himmelbegivenheder

Planetary outlook

December 2018 mid-month observing conditions

Mercury

Excellent
Tilsyneladende magnitude: -0.3
Stjernebillede: Sagittarius
Angular diameter: 6.7"
Status: near greatest eastern elongation

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

Rektascension: 16h00m44s
Deklination: -18°16'18"

Venus

Excellent
Tilsyneladende magnitude: -4.8
Stjernebillede: Scorpius
Angular diameter: 32.9"
Status: near greatest eastern elongation

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

Rektascension: 14h27m23s
Deklination: -11°35'54"

Mars

Excellent
Tilsyneladende magnitude: 0.2
Stjernebillede: Pisces
Angular diameter: 8.4"
Status: near western quadrature

Observation tip: Visible to the naked eye; Its reddish appearance is obvious; it is best observed near opposition

Rektascension: 23h19m13s
Deklination: -05°10'43"

Jupiter

Excellent
Tilsyneladende magnitude: -1.8
Stjernebillede: Sagittarius
Angular diameter: 31.3"
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

Rektascension: 16h25m48s
Deklination: -21°01'27"

Saturn

Excellent
Tilsyneladende magnitude: 0.6
Stjernebillede: Capricornus
Angular diameter: 15.1"
Status: near western quadrature

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

Rektascension: 18h40m42s
Deklination: -22°35'58"

Uranus

Fair
Tilsyneladende magnitude: 5.8
Stjernebillede: Aries
Angular diameter: 3.7"
Status: near western quadrature

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

Rektascension: 01h47m56s
Deklination: +10°32'48"

Neptune

Fair
Tilsyneladende magnitude: 7.8
Stjernebillede: Pisces
Angular diameter: 2.3"
Status: near western quadrature

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

Rektascension: 23h01m50s
Deklination: -07°16'08"

Moon

Excellent
Tilsyneladende magnitude: -12.7
Stjernebillede: Pisces
Angular diameter: 11588.3"
Status: Moon illumination 45.4%

Observation tip: Moon illumination 45.4%; good for observing lunar surface detail

Rektascension: 23h20m22s
Deklination: -08°38'05"