July 2017 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

24 sky events total, including 5 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

July 2017 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.2
กลุ่มดาว: Leo
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: 09h12m06s
เดคลิเนชัน: +17°22'47"

Venus

Excellent
Apparent magnitude: -4.1
กลุ่มดาว: Gemini
Angular diameter: 16.3"
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: 04h39m26s
เดคลิเนชัน: +19°48'21"

Mars

Excellent
Apparent magnitude: 1.6
กลุ่มดาว: Cancer
Angular diameter: 3.5"
Status: near western quadrature

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

Right ascension: 07h54m40s
เดคลิเนชัน: +21°54'30"

Jupiter

Excellent
Apparent magnitude: -1.9
กลุ่มดาว: Libra
Angular diameter: 35.9"
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: 12h57m13s
เดคลิเนชัน: -04°45'36"

Saturn

Excellent
Apparent magnitude: 0.2
กลุ่มดาว: Sagittarius
Angular diameter: 18.1"
Status: near western quadrature

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

Right ascension: 17h27m33s
เดคลิเนชัน: -21°55'32"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Aries
Angular diameter: 3.5"
Status: near eastern quadrature

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

Right ascension: 01h46m17s
เดคลิเนชัน: +10°21'19"

Neptune

Fair
Apparent magnitude: 7.7
กลุ่มดาว: Pisces
Angular diameter: 2.3"
Status: near eastern quadrature

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

Right ascension: 23h02m39s
เดคลิเนชัน: -07°07'18"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Aries
Angular diameter: 12135.7"
Status: Moon illumination 69.3%

Observation tip: Moon illumination 69.3%; good for observing lunar surface detail

Right ascension: 00h05m06s
เดคลิเนชัน: -02°45'37"