April 1999 Événements célestes

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

Aperçu des événements célestes mensuels

23 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

April 1999 mid-month observing conditions

Mercury

Excellent
Magnitude apparente: 0.5
Constellation: Pisces
Angular diameter: 8.0"
Status: near greatest eastern elongation

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

Ascension droite: 23h52m50s
Déclinaison: -03°02'39"

Venus

Excellent
Magnitude apparente: -4.0
Constellation: Gemini
Angular diameter: 14.5"
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: 04h01m58s
Déclinaison: +22°14'09"

Mars

Excellent
Magnitude apparente: -1.5
Constellation: Scorpius
Angular diameter: 15.5"
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

Ascension droite: 14h22m59s
Déclinaison: -12°26'27"

Jupiter

Excellent
Magnitude apparente: -2.1
Constellation: Aries
Angular diameter: 33.2"
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

Ascension droite: 00h54m40s
Déclinaison: +04°40'12"

Saturn

Excellent
Magnitude apparente: 0.4
Constellation: Taurus
Angular diameter: 16.3"
Status: near western quadrature

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

Ascension droite: 02h14m29s
Déclinaison: +11°10'34"

Uranus

Fair
Magnitude apparente: 5.9
Constellation: Aquarius
Angular diameter: 3.5"
Status: near eastern quadrature

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

Ascension droite: 21h15m35s
Déclinaison: -16°35'35"

Neptune

Fair
Magnitude apparente: 7.8
Constellation: Aquarius
Angular diameter: 2.3"
Status: near eastern quadrature

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

Ascension droite: 20h25m58s
Déclinaison: -18°55'04"

Moon

Excellent
Magnitude apparente: -12.7
Constellation: Aries
Angular diameter: 12805.5"
Status: Moon illumination 2.2%

Observation tip: Moon illumination 2.2%; good for observing lunar surface detail

Ascension droite: 00h35m38s
Déclinaison: -00°15'12"