December 2091 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

December 2091 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.6
กลุ่มดาว: Sagittarius
Angular diameter: 5.5"
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: 16h15m20s
เดคลิเนชัน: -20°01'29"

Venus

Excellent
Apparent magnitude: -4.0
กลุ่มดาว: Aquarius
Angular diameter: 13.4"
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: 20h05m49s
เดคลิเนชัน: -22°18'20"

Mars

Excellent
Apparent magnitude: 1.2
กลุ่มดาว: Capricornus
Angular diameter: 4.3"
Status: near western quadrature

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

Right ascension: 19h36m55s
เดคลิเนชัน: -22°44'59"

Jupiter

Excellent
Apparent magnitude: -2.0
กลุ่มดาว: Capricornus
Angular diameter: 33.2"
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: 19h48m19s
เดคลิเนชัน: -21°28'28"

Saturn

Excellent
Apparent magnitude: -0.4
กลุ่มดาว: Cancer
Angular diameter: 20.6"
Status: near eastern quadrature

Observation tip: Very bright, easily visible to the naked eye; Saturn’s rings require a telescope to see clearly

Right ascension: 06h30m48s
เดคลิเนชัน: +22°20'11"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Pisces
Angular diameter: 3.5"
Status: near western quadrature

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

Right ascension: 23h10m04s
เดคลิเนชัน: -06°10'57"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Virgo
Angular diameter: 2.3"
Status: near eastern quadrature

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

Right ascension: 10h07m54s
เดคลิเนชัน: +12°00'21"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Aquarius
Angular diameter: 12158.9"
Status: Moon illumination 23.8%

Observation tip: Moon illumination 23.8%; good for observing lunar surface detail

Right ascension: 21h34m57s
เดคลิเนชัน: -14°00'35"