September 2009 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

25 sky events total, including 4 moon phases and 3 planetary events.

เหตุการณ์ท้องฟ้า

All times are in local time (Asia/Shanghai)

Group วันที่ Sunrise/Sunset Moonrise/Moonset Moon Phase ปรากฏการณ์ท้องฟ้า

Planetary outlook

September 2009 mid-month observing conditions

Mercury

Good
Apparent magnitude: 2.9
กลุ่มดาว: Libra
Angular diameter: 10.3"
Status: near superior conjunction

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

Right ascension: 12h04m28s
เดคลิเนชัน: -04°52'38"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Leo
Angular diameter: 11.9"
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: 09h43m12s
เดคลิเนชัน: +14°25'59"

Mars

Excellent
Apparent magnitude: 0.9
กลุ่มดาว: Cancer
Angular diameter: 6.2"
Status: near eastern quadrature

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

Right ascension: 06h54m34s
เดคลิเนชัน: +23°17'33"

Jupiter

Excellent
Apparent magnitude: -2.8
กลุ่มดาว: Aquarius
Angular diameter: 47.3"
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: 21h24m55s
เดคลิเนชัน: -16°20'38"

Saturn

Excellent
Apparent magnitude: 1.0
กลุ่มดาว: Virgo
Angular diameter: 15.9"
Status: near western quadrature

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

Right ascension: 11h43m28s
เดคลิเนชัน: +03°56'03"

Uranus

Fair
Apparent magnitude: 5.8
กลุ่มดาว: Pisces
Angular diameter: 3.7"
Status: near eastern quadrature

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

Right ascension: 23h41m56s
เดคลิเนชัน: -02°49'30"

Neptune

Fair
Apparent magnitude: 7.7
กลุ่มดาว: Aquarius
Angular diameter: 2.3"
Status: near western quadrature

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

Right ascension: 21h47m09s
เดคลิเนชัน: -13°48'14"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Leo
Angular diameter: 12742.1"
Status: Moon illumination 18.9%

Observation tip: Moon illumination 18.9%; good for observing lunar surface detail

Right ascension: 08h11m57s
เดคลิเนชัน: +19°48'49"