December 1984 天象

觀測地點:Beijing (39.904°, 116.407°)

每月天象事件總覽

24 天象事件總數,包括 4 月相與 3 行星事件。

每日天象事件

所有時間均為當地時間 (Asia/Shanghai)

Group 日期 日出/日落 月出/月落 月相 天象

Planetary outlook

December 1984 mid-month observing conditions

Mercury

Fair
視星等: 5.9
星座: Sagittarius
Angular diameter: 9.9"
Status: near greatest eastern elongation

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

赤經: 17h26m41s
赤緯: -21°17'25"

Venus

Excellent
視星等: -4.2
星座: Aquarius
Angular diameter: 17.3"
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

赤經: 20h39m24s
赤緯: -20°41'57"

Mars

Excellent
視星等: 0.8
星座: Aquarius
Angular diameter: 5.8"
Status: near western quadrature

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

赤經: 21h39m41s
赤緯: -15°17'02"

Jupiter

Excellent
視星等: -1.9
星座: Capricornus
Angular diameter: 32.6"
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

赤經: 19h16m20s
赤緯: -22°30'44"

Saturn

Excellent
視星等: 0.6
星座: Scorpius
Angular diameter: 15.5"
Status: near eastern quadrature

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

赤經: 15h24m30s
赤緯: -16°32'17"

Uranus

Fair
視星等: 5.7
星座: Sagittarius
Angular diameter: 3.5"
Status: near eastern quadrature

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

赤經: 16h52m07s
赤緯: -22°31'29"

Neptune

Fair
視星等: 8.0
星座: Capricornus
Angular diameter: 2.2"
Status: near western quadrature

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

赤經: 18h03m38s
赤緯: -22°19'29"

Moon

Excellent
視星等: -12.7
星座: Virgo
Angular diameter: 12504.4"
Status: Moon illumination 57.4%

Observation tip: Moon illumination 57.4%; good for observing lunar surface detail

赤經: 11h11m50s
赤緯: +10°35'06"