May 2021 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

21 sky events total, including 4 moon phases and 1 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

May 2021 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: 0.2
กลุ่มดาว: Gemini
Angular diameter: 7.6"
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: 04h58m31s
เดคลิเนชัน: +25°07'55"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Gemini
Angular diameter: 10.0"
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: 04h21m40s
เดคลิเนชัน: +21°44'21"

Mars

Excellent
Apparent magnitude: 1.7
กลุ่มดาว: Cancer
Angular diameter: 4.4"
Status: near western quadrature

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

Right ascension: 06h57m29s
เดคลิเนชัน: +24°11'58"

Jupiter

Excellent
Apparent magnitude: -2.3
กลุ่มดาว: Pisces
Angular diameter: 39.0"
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: 22h09m57s
เดคลิเนชัน: -12°10'47"

Saturn

Excellent
Apparent magnitude: 0.6
กลุ่มดาว: Aquarius
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: 21h04m26s
เดคลิเนชัน: -17°22'02"

Uranus

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

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

Right ascension: 02h36m45s
เดคลิเนชัน: +14°53'41"

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: 23h35m03s
เดคลิเนชัน: -03°53'24"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Gemini
Angular diameter: 11537.9"
Status: Moon illumination 9.0%

Observation tip: Moon illumination 9.0%; good for observing lunar surface detail

Right ascension: 05h56m41s
เดคลิเนชัน: +25°06'58"