December 2020 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

22 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

December 2020 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -1.1
กลุ่มดาว: Sagittarius
Angular diameter: 4.7"
Status: near inferior conjunction

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

Right ascension: 17h18m46s
เดคลิเนชัน: -24°05'38"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Scorpius
Angular diameter: 11.2"
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: 15h48m55s
เดคลิเนชัน: -18°42'17"

Mars

Excellent
Apparent magnitude: -0.7
กลุ่มดาว: Aries
Angular diameter: 12.5"
Status: near western quadrature

Observation tip: Very bright, easily visible to the naked eye; Its reddish appearance is obvious; it is best observed near opposition

Right ascension: 01h16m16s
เดคลิเนชัน: +08°33'00"

Jupiter

Excellent
Apparent magnitude: -2.0
กลุ่มดาว: Aquarius
Angular diameter: 33.6"
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: 20h05m02s
เดคลิเนชัน: -20°49'03"

Saturn

Excellent
Apparent magnitude: 0.7
กลุ่มดาว: Aquarius
Angular diameter: 15.4"
Status: near western quadrature

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

Right ascension: 20h08m05s
เดคลิเนชัน: -20°33'40"

Uranus

Fair
Apparent magnitude: 5.7
กลุ่มดาว: Taurus
Angular diameter: 3.7"
Status: near western quadrature

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

Right ascension: 02h19m40s
เดคลิเนชัน: +13°27'05"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Pisces
Angular diameter: 2.3"
Status: near western quadrature

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

Right ascension: 23h18m26s
เดคลิเนชัน: -05°39'12"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Sagittarius
Angular diameter: 12731.9"
Status: Moon illumination 0.1%

Observation tip: Moon illumination 0.1%; good for observing lunar surface detail

Right ascension: 17h50m30s
เดคลิเนชัน: -24°08'50"