December 2011 Himmelbegivenheder

Observatørens placering:Beijing (39.904°, 116.407°)

Månedlig oversigt over himmelbegivenheder

16 himmelbegivenheder i alt, inklusive 4 månefaser og 2 planetariske begivenheder.

Daglige himmelbegivenheder

Alle tider er i lokal tid (Asia/Shanghai)

Group Dato Solopgang/Solnedgang Måneopgang/Månenedgang Månefase Himmelbegivenheder

Planetary outlook

December 2011 mid-month observing conditions

Mercury

Excellent
Tilsyneladende magnitude: 0.1
Stjernebillede: Sagittarius
Angular diameter: 8.1"
Status: near greatest eastern elongation

Observation tip: Visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Rektascension: 16h09m55s
Deklination: -18°10'05"

Venus

Excellent
Tilsyneladende magnitude: -3.9
Stjernebillede: Capricornus
Angular diameter: 12.1"
Status: near greatest western 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: 19h40m04s
Deklination: -23°13'36"

Mars

Excellent
Tilsyneladende magnitude: 0.5
Stjernebillede: Virgo
Angular diameter: 7.8"
Status: near eastern quadrature

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

Rektascension: 11h08m21s
Deklination: +08°14'51"

Jupiter

Excellent
Tilsyneladende magnitude: -2.7
Stjernebillede: Aries
Angular diameter: 45.8"
Status: near western 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: 01h55m42s
Deklination: +10°26'14"

Saturn

Excellent
Tilsyneladende magnitude: 0.8
Stjernebillede: Libra
Angular diameter: 16.3"
Status: near eastern quadrature

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

Rektascension: 13h43m43s
Deklination: -08°12'31"

Uranus

Fair
Tilsyneladende magnitude: 5.9
Stjernebillede: Aries
Angular diameter: 3.5"
Status: near western quadrature

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

Rektascension: 00h03m33s
Deklination: -00°24'53"

Neptune

Fair
Tilsyneladende magnitude: 7.8
Stjernebillede: Pisces
Angular diameter: 2.2"
Status: near western quadrature

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

Rektascension: 22h03m20s
Deklination: -12°30'45"

Moon

Excellent
Tilsyneladende magnitude: -12.7
Stjernebillede: Leo
Angular diameter: 12149.2"
Status: Moon illumination 81.0%

Observation tip: Moon illumination 81.0%; good for observing lunar surface detail

Rektascension: 09h01m52s
Deklination: +12°07'46"