April 1998 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

22 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

April 1998 mid-month observing conditions

Mercury

Good
Apparent magnitude: 2.9
กลุ่มดาว: Aries
Angular diameter: 11.3"
Status: near greatest eastern elongation

Observation tip: Visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 00h39m44s
เดคลิเนชัน: +04°45'44"

Venus

Excellent
Apparent magnitude: -4.3
กลุ่มดาว: Pisces
Angular diameter: 20.3"
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: 22h43m34s
เดคลิเนชัน: -08°11'53"

Mars

Excellent
Apparent magnitude: 1.2
กลุ่มดาว: Aries
Angular diameter: 3.8"
Status: near western quadrature

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

Right ascension: 01h57m35s
เดคลิเนชัน: +11°44'27"

Jupiter

Excellent
Apparent magnitude: -2.1
กลุ่มดาว: Pisces
Angular diameter: 34.3"
Status: near eastern 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: 23h10m59s
เดคลิเนชัน: -06°18'33"

Saturn

Excellent
Apparent magnitude: 0.6
กลุ่มดาว: Aries
Angular diameter: 16.1"
Status: near eastern quadrature

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

Right ascension: 01h30m28s
เดคลิเนชัน: +07°03'10"

Uranus

Fair
Apparent magnitude: 5.9
กลุ่มดาว: Aquarius
Angular diameter: 3.5"
Status: near eastern quadrature

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

Right ascension: 20h59m49s
เดคลิเนชัน: -17°42'33"

Neptune

Fair
Apparent magnitude: nan
กลุ่มดาว: Aquarius
Angular diameter: 2.3"
Status: near eastern quadrature

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

Right ascension: 20h16m56s
เดคลิเนชัน: -19°21'15"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Scorpius
Angular diameter: 11593.0"
Status: Moon illumination 91.5%

Observation tip: Moon illumination 91.5%; good for observing lunar surface detail

Right ascension: 15h49m49s
เดคลิเนชัน: -14°54'47"