April 2018 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

21 sky events total, including 4 moon phases and 3 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

April 2018 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: 1.5
กลุ่มดาว: Aries
Angular diameter: 10.5"
Status: near greatest eastern elongation

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

Right ascension: 00h18m19s
เดคลิเนชัน: +01°27'26"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Taurus
Angular diameter: 10.9"
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: 03h02m41s
เดคลิเนชัน: +17°21'42"

Mars

Excellent
Apparent magnitude: -0.0
กลุ่มดาว: Capricornus
Angular diameter: 9.5"
Status: near eastern quadrature

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

Right ascension: 19h07m49s
เดคลิเนชัน: -23°15'57"

Jupiter

Excellent
Apparent magnitude: -2.5
กลุ่มดาว: Scorpius
Angular diameter: 43.8"
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: 15h16m31s
เดคลิเนชัน: -16°49'53"

Saturn

Excellent
Apparent magnitude: 0.4
กลุ่มดาว: Capricornus
Angular diameter: 17.1"
Status: near eastern quadrature

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

Right ascension: 18h39m31s
เดคลิเนชัน: -22°14'14"

Uranus

Fair
Apparent magnitude: 6.0
กลุ่มดาว: Aries
Angular diameter: 3.4"
Status: near western quadrature

Observation tip: A telescope is required; Binoculars or a telescope are recommended

Right ascension: 01h45m50s
เดคลิเนชัน: +10°22'11"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Pisces
Angular diameter: 2.2"
Status: near eastern quadrature

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

Right ascension: 23h07m41s
เดคลิเนชัน: -06°35'53"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Aries
Angular diameter: 12176.8"
Status: Moon illumination 1.6%

Observation tip: Moon illumination 1.6%; good for observing lunar surface detail

Right ascension: 00h48m31s
เดคลิเนชัน: +00°30'34"