April 1940 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

24 sky events total, including 4 moon phases and 4 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

April 1940 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: 0.4
กลุ่มดาว: Pisces
Angular diameter: 7.4"
Status: near inferior conjunction

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

Right ascension: 23h54m29s
เดคลิเนชัน: -03°11'41"

Venus

Excellent
Apparent magnitude: -4.4
กลุ่มดาว: Gemini
Angular diameter: 22.8"
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

Right ascension: 04h33m28s
เดคลิเนชัน: +25°17'42"

Mars

Excellent
Apparent magnitude: 1.6
กลุ่มดาว: Gemini
Angular diameter: 4.4"
Status: near western quadrature

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

Right ascension: 04h27m23s
เดคลิเนชัน: +22°43'41"

Jupiter

Excellent
Apparent magnitude: -2.1
กลุ่มดาว: Aries
Angular diameter: 33.1"
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: 01h25m09s
เดคลิเนชัน: +07°48'10"

Saturn

Excellent
Apparent magnitude: 0.4
กลุ่มดาว: Taurus
Angular diameter: 16.2"
Status: near western quadrature

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

Right ascension: 02h06m43s
เดคลิเนชัน: +10°29'10"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Taurus
Angular diameter: 3.4"
Status: near western quadrature

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

Right ascension: 03h12m12s
เดคลิเนชัน: +17°35'16"

Neptune

Fair
Apparent magnitude: 7.9
กลุ่มดาว: Virgo
Angular diameter: 2.3"
Status: near western quadrature

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

Right ascension: 11h37m30s
เดคลิเนชัน: +03°47'44"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Cancer
Angular diameter: 12250.5"
Status: Moon illumination 43.9%

Observation tip: Moon illumination 43.9%; good for observing lunar surface detail

Right ascension: 07h13m38s
เดคลิเนชัน: +17°01'53"