December 1990 Sky Events
Observer Location：Beijing (39.904°, 116.407°)
Monthly Sky Events Overview
27 sky events total, including 4 moon phases and 3 planetary events.
Daily Sky Events
All times are in local time (Asia/Shanghai)
| Date | Sunrise/Sunset | Moonrise/Moonset | Moon Phase | Sky Events |
|---|
Planetary outlook
December 1990 mid-month observing conditions
Mercury
Observation tip: Visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn
Venus
Observation tip: Very bright, easily visible to the naked eye; Venus is the brightest planet and is best seen at dusk or dawn
Mars
Observation tip: Very bright, easily visible to the naked eye; Its reddish appearance is obvious; it is best observed near opposition
Jupiter
Observation tip: Very bright, easily visible to the naked eye; Its moons are easy to spot and it is excellent for telescope observing
Saturn
Observation tip: Visible to the naked eye; Saturn’s rings require a telescope to see clearly
Uranus
Observation tip: Binoculars are recommended; Binoculars or a telescope are recommended
Neptune
Observation tip: A telescope is required; A telescope is required; Neptune appears blue-green
Moon
Observation tip: Moon illumination 4.3%; good for observing lunar surface detail
1990 sky events by month
Choose a month to explore the detailed forecast