April 2021 天文現象

観測地点:Beijing (39.904°, 116.407°)

月間天文現象概要

23 合計天文イベント、含む 4 月相と 1 惑星イベント。

毎日の天文現象

すべての時刻は現地時間 (Asia/Shanghai)

Group 日付 日の出/日の入り 月の出/月の入り 月相 天文現象

Planetary outlook

April 2021 mid-month observing conditions

Mercury

Excellent
見かけの等級: -1.7
星座: Aries
Angular diameter: 5.0"
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

赤経: 01h18m32s
赤緯: +07°00'08"

Venus

Excellent
見かけの等級: -3.9
星座: Aries
Angular diameter: 9.7"
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

赤経: 01h54m03s
赤緯: +10°43'08"

Mars

Excellent
見かけの等級: 1.4
星座: Gemini
Angular diameter: 5.0"
Status: near western quadrature

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

赤経: 05h37m21s
赤緯: +24°48'32"

Jupiter

Excellent
見かけの等級: -2.1
星座: Aquarius
Angular diameter: 35.9"
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

赤経: 21h53m15s
赤緯: -13°33'51"

Saturn

Excellent
見かけの等級: 0.7
星座: Aquarius
Angular diameter: 16.3"
Status: near eastern quadrature

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

赤経: 20h59m51s
赤緯: -17°37'15"

Uranus

Fair
見かけの等級: 5.9
星座: Taurus
Angular diameter: 3.4"
Status: near western quadrature

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

赤経: 02h30m01s
赤緯: +14°21'20"

Neptune

Fair
見かけの等級: 7.8
星座: Pisces
Angular diameter: 2.2"
Status: near eastern quadrature

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

赤経: 23h31m57s
赤緯: -04°12'11"

Moon

Excellent
見かけの等級: -12.7
星座: Taurus
Angular diameter: 11456.2"
Status: Moon illumination 7.4%

Observation tip: Moon illumination 7.4%; good for observing lunar surface detail

赤経: 03h39m09s
赤緯: +18°09'31"