December 1904 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

22 sky events total, including 4 moon phases and 4 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

December 1904 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.5
กลุ่มดาว: Capricornus
Angular diameter: 6.8"
Status: near superior 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: 18h57m22s
เดคลิเนชัน: -24°34'13"

Venus

Excellent
Apparent magnitude: -4.1
กลุ่มดาว: Aquarius
Angular diameter: 14.7"
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: 20h18m51s
เดคลิเนชัน: -21°46'41"

Mars

Excellent
Apparent magnitude: 1.3
กลุ่มดาว: Libra
Angular diameter: 5.3"
Status: near eastern quadrature

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

Right ascension: 12h54m36s
เดคลิเนชัน: -04°04'34"

Jupiter

Excellent
Apparent magnitude: -2.6
กลุ่มดาว: Aries
Angular diameter: 44.5"
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: 01h16m50s
เดคลิเนชัน: +06°38'37"

Saturn

Excellent
Apparent magnitude: 0.8
กลุ่มดาว: Aquarius
Angular diameter: 16.0"
Status: near western quadrature

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

Right ascension: 21h19m00s
เดคลิเนชัน: -16°50'50"

Uranus

Fair
Apparent magnitude: 5.8
กลุ่มดาว: Sagittarius
Angular diameter: 3.5"
Status: near western quadrature

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

Right ascension: 17h58m32s
เดคลิเนชัน: -23°39'25"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Cancer
Angular diameter: 2.4"
Status: near eastern quadrature

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

Right ascension: 06h30m59s
เดคลิเนชัน: +22°13'38"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Pisces
Angular diameter: 11508.4"
Status: Moon illumination 50.9%

Observation tip: Moon illumination 50.9%; good for observing lunar surface detail

Right ascension: 23h37m26s
เดคลิเนชัน: -03°26'28"