April 2004 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

24 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

April 2004 mid-month observing conditions

Mercury

Fair
Apparent magnitude: 5.7
กลุ่มดาว: Aries
Angular diameter: 11.4"
Status: near superior conjunction

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

Right ascension: 01h43m38s
เดคลิเนชัน: +13°12'59"

Venus

Excellent
Apparent magnitude: -4.6
กลุ่มดาว: Gemini
Angular diameter: 28.6"
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: 04h31m06s
เดคลิเนชัน: +26°06'05"

Mars

Excellent
Apparent magnitude: 1.5
กลุ่มดาว: Gemini
Angular diameter: 4.6"
Status: near western quadrature

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

Right ascension: 04h57m40s
เดคลิเนชัน: +23°51'50"

Jupiter

Excellent
Apparent magnitude: -2.3
กลุ่มดาว: Virgo
Angular diameter: 42.1"
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: 10h46m30s
เดคลิเนชัน: +09°16'50"

Saturn

Excellent
Apparent magnitude: 0.1
กลุ่มดาว: Cancer
Angular diameter: 17.9"
Status: near western quadrature

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

Right ascension: 06h33m02s
เดคลิเนชัน: +22°48'11"

Uranus

Fair
Apparent magnitude: 6.0
กลุ่มดาว: Pisces
Angular diameter: 3.4"
Status: near eastern quadrature

Observation tip: A telescope is required; Binoculars or a telescope are recommended

Right ascension: 22h30m30s
เดคลิเนชัน: -10°09'43"

Neptune

Fair
Apparent magnitude: 7.8
กลุ่มดาว: Aquarius
Angular diameter: 2.2"
Status: near eastern quadrature

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

Right ascension: 21h10m20s
เดคลิเนชัน: -16°20'56"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Pisces
Angular diameter: 12168.8"
Status: Moon illumination 20.7%

Observation tip: Moon illumination 20.7%; good for observing lunar surface detail

Right ascension: 22h21m10s
เดคลิเนชัน: -15°34'23"