September 1981 Sky Events

Observer Location:Beijing (39.904°, 116.407°)

Monthly Sky Events Overview

20 sky events total, including 4 moon phases and 1 planetary events.

Daily Sky Events

All times are in local time (Asia/Shanghai)

Group Date Sunrise/Sunset Moonrise/Moonset Moon Phase Sky Events

Planetary outlook

September 1981 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: 0.0
Constellation: Libra
Angular diameter: 6.1"
Status: near greatest western elongation

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

Right ascension: 12h59m45s
Declination: -08°10'21"

Venus

Excellent
Apparent magnitude: -4.0
Constellation: Libra
Angular diameter: 15.3"
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

Right ascension: 13h59m44s
Declination: -13°00'38"

Mars

Excellent
Apparent magnitude: 1.6
Constellation: Leo
Angular diameter: 4.3"
Status: near eastern quadrature

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

Right ascension: 08h43m27s
Declination: +19°17'02"

Jupiter

Excellent
Apparent magnitude: -1.7
Constellation: Libra
Angular diameter: 31.0"
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: 12h55m07s
Declination: -04°41'53"

Saturn

Excellent
Apparent magnitude: 0.9
Constellation: Libra
Angular diameter: 15.7"
Status: near western quadrature

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

Right ascension: 12h41m12s
Declination: -02°01'21"

Uranus

Fair
Apparent magnitude: 5.6
Constellation: Scorpius
Angular diameter: 3.7"
Status: near western quadrature

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

Right ascension: 15h38m07s
Declination: -19°15'20"

Neptune

Fair
Apparent magnitude: nan
Constellation: Sagittarius
Angular diameter: 2.3"
Status: near western quadrature

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

Right ascension: 17h26m02s
Declination: -21°54'01"

Moon

Excellent
Apparent magnitude: -12.7
Constellation: Aries
Angular diameter: 12627.0"
Status: Moon illumination 98.8%

Observation tip: Moon illumination 98.8%; good for observing lunar surface detail

Right ascension: 00h20m35s
Declination: -02°43'52"