September 2025 Sky Events

Observer Location:Beijing (39.904°, 116.407°)

Monthly Sky Events Overview

24 sky events total, including 4 moon phases and 3 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 2025 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -1.6
Constellation: Virgo
Angular diameter: 4.9"
Status: near greatest western elongation

Observation tip: Very bright, easily visible to the naked eye; Mercury stays close to the Sun; best seen at dusk or dawn

Right ascension: 11h39m34s
Declination: +03°51'20"

Venus

Excellent
Apparent magnitude: -3.9
Constellation: Leo
Angular diameter: 11.7"
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: 09h48m10s
Declination: +14°04'55"

Mars

Excellent
Apparent magnitude: 1.6
Constellation: Libra
Angular diameter: 4.1"
Status: near western quadrature

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

Right ascension: 13h33m11s
Declination: -09°37'41"

Jupiter

Excellent
Apparent magnitude: -2.0
Constellation: Cancer
Angular diameter: 35.4"
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: 07h27m31s
Declination: +21°54'23"

Saturn

Excellent
Apparent magnitude: 0.6
Constellation: Aries
Angular diameter: 19.4"
Status: near eastern quadrature

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

Right ascension: 00h00m17s
Declination: -02°41'52"

Uranus

Fair
Apparent magnitude: 5.7
Constellation: Taurus
Angular diameter: 3.7"
Status: near eastern quadrature

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

Right ascension: 03h57m25s
Declination: +20°14'26"

Neptune

Fair
Apparent magnitude: 7.7
Constellation: Aries
Angular diameter: 2.4"
Status: near eastern quadrature

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

Right ascension: 00h05m49s
Declination: -00°51'51"

Moon

Excellent
Apparent magnitude: -12.7
Constellation: Gemini
Angular diameter: 12443.0"
Status: Moon illumination 43.8%

Observation tip: Moon illumination 43.8%; good for observing lunar surface detail

Right ascension: 05h58m40s
Declination: +28°37'06"