August 1917 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

24 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

August 1917 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: 0.2
กลุ่มดาว: Virgo
Angular diameter: 6.5"
Status: near greatest western elongation

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

Right ascension: 11h13m13s
เดคลิเนชัน: +04°11'30"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Virgo
Angular diameter: 11.9"
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: 11h28m29s
เดคลิเนชัน: +04°39'44"

Mars

Excellent
Apparent magnitude: 1.5
กลุ่มดาว: Cancer
Angular diameter: 4.3"
Status: near eastern quadrature

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

Right ascension: 06h51m38s
เดคลิเนชัน: +23°32'16"

Jupiter

Excellent
Apparent magnitude: -2.2
กลุ่มดาว: Gemini
Angular diameter: 37.8"
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: 04h26m10s
เดคลิเนชัน: +20°50'08"

Saturn

Excellent
Apparent magnitude: 0.3
กลุ่มดาว: Leo
Angular diameter: 16.5"
Status: near eastern quadrature

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

Right ascension: 08h36m07s
เดคลิเนชัน: +19°06'02"

Uranus

Fair
Apparent magnitude: 5.8
กลุ่มดาว: Aquarius
Angular diameter: 3.7"
Status: near eastern quadrature

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

Right ascension: 21h37m29s
เดคลิเนชัน: -14°58'42"

Neptune

Fair
Apparent magnitude: 8.0
กลุ่มดาว: Leo
Angular diameter: 2.2"
Status: near eastern quadrature

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

Right ascension: 08h30m17s
เดคลิเนชัน: +18°46'59"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Cancer
Angular diameter: 11560.7"
Status: Moon illumination 6.8%

Observation tip: Moon illumination 6.8%; good for observing lunar surface detail

Right ascension: 07h31m45s
เดคลิเนชัน: +20°45'44"