July 1917 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

24 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

July 1917 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -1.9
กลุ่มดาว: Cancer
Angular diameter: 5.0"
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: 07h47m32s
เดคลิเนชัน: +22°49'49"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Leo
Angular diameter: 10.7"
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: 09h04m47s
เดคลิเนชัน: +18°20'32"

Mars

Excellent
Apparent magnitude: 1.5
กลุ่มดาว: Gemini
Angular diameter: 4.1"
Status: near eastern quadrature

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

Right ascension: 05h21m02s
เดคลิเนชัน: +23°23'54"

Jupiter

Excellent
Apparent magnitude: -2.1
กลุ่มดาว: Gemini
Angular diameter: 35.1"
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: 04h04m34s
เดคลิเนชัน: +19°57'25"

Saturn

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

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

Right ascension: 08h19m40s
เดคลิเนชัน: +20°00'34"

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: 21h42m00s
เดคลิเนชัน: -14°35'43"

Neptune

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

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

Right ascension: 08h25m36s
เดคลิเนชัน: +19°03'02"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Gemini
Angular diameter: 11930.5"
Status: Moon illumination 16.0%

Observation tip: Moon illumination 16.0%; good for observing lunar surface detail

Right ascension: 04h09m26s
เดคลิเนชัน: +24°10'20"