September 2011 ปรากฏการณ์ท้องฟ้า

Observer Location:Beijing (39.904°, 116.407°)

ภาพรวมดาวเคราะห์

20 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 2011 mid-month observing conditions

Mercury

Excellent
Apparent magnitude: -1.3
กลุ่มดาว: Virgo
Angular diameter: 5.5"
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

Right ascension: 10h48m05s
เดคลิเนชัน: +09°29'13"

Venus

Excellent
Apparent magnitude: -3.9
กลุ่มดาว: Libra
Angular diameter: 9.8"
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: 12h01m34s
เดคลิเนชัน: +01°15'22"

Mars

Excellent
Apparent magnitude: 1.4
กลุ่มดาว: Cancer
Angular diameter: 4.9"
Status: near eastern quadrature

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

Right ascension: 07h58m59s
เดคลิเนชัน: +21°32'02"

Jupiter

Excellent
Apparent magnitude: -2.7
กลุ่มดาว: Taurus
Angular diameter: 46.6"
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: 02h32m01s
เดคลิเนชัน: +13°26'25"

Saturn

Excellent
Apparent magnitude: 0.9
กลุ่มดาว: 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: 13h05m09s
เดคลิเนชัน: -04°28'45"

Uranus

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

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

Right ascension: 00h12m17s
เดคลิเนชัน: +00°29'32"

Neptune

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

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

Right ascension: 22h04m59s
เดคลิเนชัน: -12°22'22"

Moon

Excellent
Apparent magnitude: -12.7
กลุ่มดาว: Aries
Angular diameter: 11458.9"
Status: Moon illumination 93.8%

Observation tip: Moon illumination 93.8%; good for observing lunar surface detail

Right ascension: 01h08m57s
เดคลิเนชัน: +11°54'27"