December 2012 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

19 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 2012 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -0.5
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: 16h14m38s
เดคลิเนชัน: -19°58'46"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Scorpius
Angular diameter: 11.3"
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: 15h46m19s
เดคลิเนชัน: -18°31'53"

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: 19h33m15s
เดคลิเนชัน: -22°53'14"

Jupiter

Excellent
Apparent magnitude: -2.8
กลุ่มดาว: Gemini
Angular diameter: 48.1"
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: 04h32m39s
เดคลิเนชัน: +21°08'53"

Saturn

Excellent
Apparent magnitude: 0.7
กลุ่มดาว: Scorpius
Angular diameter: 15.9"
Status: near eastern quadrature

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

Right ascension: 14h25m47s
เดคลิเนชัน: -12°01'21"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Aries
Angular diameter: 3.6"
Status: near western quadrature

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

Right ascension: 00h18m04s
เดคลิเนชัน: +01°10'31"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Pisces
Angular diameter: 2.2"
Status: near western quadrature

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

Right ascension: 22h11m50s
เดคลิเนชัน: -11°48'08"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Capricornus
Angular diameter: 12884.1"
Status: Moon illumination 4.1%

Observation tip: Moon illumination 4.1%; good for observing lunar surface detail

Right ascension: 19h09m33s
เดคลิเนชัน: -18°23'31"