April 1917 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

23 sky events total, including 4 moon phases and 2 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

April 1917 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.9
กลุ่มดาว: Taurus
Angular diameter: 6.1"
Status: near greatest western elongation

Observation tip: Very bright, easily visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 02h31m14s
เดคลิเนชัน: +16°41'00"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Aries
Angular diameter: 9.7"
Status: near inferior conjunction

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: 01h21m14s
เดคลิเนชัน: +07°15'03"

Mars

Excellent
Apparent magnitude: 1.2
กลุ่มดาว: Aries
Angular diameter: 3.9"
Status: near eastern quadrature

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

Right ascension: 00h55m54s
เดคลิเนชัน: +05°12'30"

Jupiter

Excellent
Apparent magnitude: -2.0
กลุ่มดาว: Taurus
Angular diameter: 33.2"
Status: near western 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: 02h41m12s
เดคลิเนชัน: +14°44'38"

Saturn

Excellent
Apparent magnitude: 0.1
กลุ่มดาว: Cancer
Angular diameter: 18.4"
Status: near western quadrature

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

Right ascension: 07h43m51s
เดคลิเนชัน: +21°37'58"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Aquarius
Angular diameter: 3.4"
Status: near eastern quadrature

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

Right ascension: 21h42m04s
เดคลิเนชัน: -14°31'58"

Neptune

Fair
Apparent magnitude: nan
กลุ่มดาว: Leo
Angular diameter: 2.3"
Status: near western quadrature

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

Right ascension: 08h17m12s
เดคลิเนชัน: +19°29'43"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Capricornus
Angular diameter: 12549.2"
Status: Moon illumination 48.3%

Observation tip: Moon illumination 48.3%; good for observing lunar surface detail

Right ascension: 19h53m19s
เดคลิเนชัน: -19°48'17"