December 1920 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

14 sky events total, including 4 moon phases and 1 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

December 1920 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.6
กลุ่มดาว: Sagittarius
Angular diameter: 5.4"
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

Right ascension: 16h14m21s
เดคลิเนชัน: -20°08'08"

Venus

Excellent
Apparent magnitude: -4.1
กลุ่มดาว: Aquarius
Angular diameter: 15.2"
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

Right ascension: 20h23m19s
เดคลิเนชัน: -21°33'37"

Mars

Excellent
Apparent magnitude: 1.0
กลุ่มดาว: Aquarius
Angular diameter: 5.3"
Status: near western quadrature

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

Right ascension: 21h05m12s
เดคลิเนชัน: -18°00'32"

Jupiter

Excellent
Apparent magnitude: -2.1
กลุ่มดาว: Virgo
Angular diameter: 37.7"
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

Right ascension: 11h18m43s
เดคลิเนชัน: +05°41'20"

Saturn

Excellent
Apparent magnitude: 1.0
กลุ่มดาว: Virgo
Angular diameter: 17.7"
Status: near eastern quadrature

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

Right ascension: 11h42m46s
เดคลิเนชัน: +04°06'09"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Pisces
Angular diameter: 3.5"
Status: near western quadrature

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

Right ascension: 22h17m57s
เดคลิเนชัน: -11°23'08"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Leo
Angular diameter: 2.3"
Status: near eastern quadrature

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

Right ascension: 09h04m03s
เดคลิเนชัน: +16°48'05"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Aquarius
Angular diameter: 11488.3"
Status: Moon illumination 17.9%

Observation tip: Moon illumination 17.9%; good for observing lunar surface detail

Right ascension: 20h54m09s
เดคลิเนชัน: -12°10'04"