December 1997 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

20 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 1997 mid-month observing conditions

Mercury

Fair
Apparent magnitude: 4.3
กลุ่มดาว: Sagittarius
Angular diameter: 9.8"
Status: near superior conjunction

Observation tip: Binoculars are recommended; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 17h53m39s
เดคลิเนชัน: -22°13'42"

Venus

Excellent
Apparent magnitude: -4.9
กลุ่มดาว: Aquarius
Angular diameter: 43.1"
Status: near superior 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: 20h15m27s
เดคลิเนชัน: -21°15'37"

Mars

Excellent
Apparent magnitude: 1.1
กลุ่มดาว: Capricornus
Angular diameter: 4.5"
Status: near western quadrature

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

Right ascension: 19h59m04s
เดคลิเนชัน: -21°52'36"

Jupiter

Excellent
Apparent magnitude: -2.1
กลุ่มดาว: Aquarius
Angular diameter: 35.8"
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: 21h26m31s
เดคลิเนชัน: -15°59'20"

Saturn

Excellent
Apparent magnitude: 0.5
กลุ่มดาว: Aries
Angular diameter: 18.5"
Status: near western quadrature

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

Right ascension: 00h53m50s
เดคลิเนชัน: +02°57'29"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Aquarius
Angular diameter: 3.4"
Status: near western quadrature

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

Right ascension: 20h35m13s
เดคลิเนชัน: -19°17'28"

Neptune

Fair
Apparent magnitude: 7.9
กลุ่มดาว: Aquarius
Angular diameter: 2.2"
Status: near western quadrature

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

Right ascension: 20h01m32s
เดคลิเนชัน: -20°07'40"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Cancer
Angular diameter: 12209.9"
Status: Moon illumination 98.9%

Observation tip: Moon illumination 98.9%; good for observing lunar surface detail

Right ascension: 06h18m00s
เดคลิเนชัน: +18°39'44"