December 1987 Événements célestes

Lieu d'observation:Beijing (39.904°, 116.407°)

Aperçu des événements célestes mensuels

26 événements célestes au total, dont 4 phases lunaires et 4 événements planétaires.

Événements célestes quotidiens

Toutes les heures en heure locale (Asia/Shanghai)

Group Date Lever/Coucher du soleil Lever/Coucher de la lune Phase lunaire Événements célestes

Planetary outlook

December 1987 mid-month observing conditions

Mercury

Excellent
Magnitude apparente: -1.0
Constellation: Sagittarius
Angular diameter: 4.7"
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

Ascension droite: 17h06m46s
Déclinaison: -23°39'09"

Venus

Excellent
Magnitude apparente: -3.9
Constellation: Capricornus
Angular diameter: 11.8"
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

Ascension droite: 19h31m56s
Déclinaison: -23°27'43"

Mars

Excellent
Magnitude apparente: 1.7
Constellation: Scorpius
Angular diameter: 4.1"
Status: near eastern quadrature

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

Ascension droite: 14h45m41s
Déclinaison: -15°21'12"

Jupiter

Excellent
Magnitude apparente: -2.6
Constellation: Aries
Angular diameter: 44.5"
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

Ascension droite: 01h15m04s
Déclinaison: +06°27'22"

Saturn

Excellent
Magnitude apparente: 0.4
Constellation: Sagittarius
Angular diameter: 15.1"
Status: near western quadrature

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

Ascension droite: 17h31m46s
Déclinaison: -22°09'03"

Uranus

Fair
Magnitude apparente: 5.8
Constellation: Sagittarius
Angular diameter: 3.5"
Status: near western quadrature

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

Ascension droite: 17h45m19s
Déclinaison: -23°33'51"

Neptune

Fair
Magnitude apparente: 7.9
Constellation: Capricornus
Angular diameter: 2.2"
Status: near western quadrature

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

Ascension droite: 18h30m54s
Déclinaison: -22°17'26"

Moon

Excellent
Magnitude apparente: -12.7
Constellation: Libra
Angular diameter: 11827.3"
Status: Moon illumination 35.5%

Observation tip: Moon illumination 35.5%; good for observing lunar surface detail

Ascension droite: 12h33m05s
Déclinaison: -04°37'16"