December 1998 Dangaus reiškiniai

Stebėtojo vieta:Beijing (39.904°, 116.407°)

Mėnesio dangaus reiškinių apžvalga

24 astronominių įvykių iš viso, įskaitant 4 Mėnulio fazes ir 2 planetinius įvykius.

Dienos dangaus reiškiniai

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Group Data Saulėtekis/Saulėlydis Mėnulio patekėjimas/leidimasis Mėnulio fazė Dangaus reiškiniai

Planetary outlook

December 1998 mid-month observing conditions

Mercury

Excellent
Regimasis ryškis: -0.1
Žvaigždynas: Sagittarius
Angular diameter: 7.5"
Status: near greatest eastern elongation

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

Rektascensija: 16h03m25s
Deklinacija: -18°01'13"

Venus

Excellent
Regimasis ryškis: -3.9
Žvaigždynas: Capricornus
Angular diameter: 10.0"
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

Rektascensija: 18h17m45s
Deklinacija: -24°10'33"

Mars

Excellent
Regimasis ryškis: 1.2
Žvaigždynas: Libra
Angular diameter: 5.6"
Status: near eastern quadrature

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

Rektascensija: 12h38m12s
Deklinacija: -02°10'07"

Jupiter

Excellent
Regimasis ryškis: -2.4
Žvaigždynas: Pisces
Angular diameter: 40.1"
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

Rektascensija: 23h24m36s
Deklinacija: -05°13'43"

Saturn

Excellent
Regimasis ryškis: 0.3
Žvaigždynas: Aries
Angular diameter: 19.1"
Status: near western quadrature

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

Rektascensija: 01h43m54s
Deklinacija: +07°56'25"

Uranus

Fair
Regimasis ryškis: 5.9
Žvaigždynas: Aquarius
Angular diameter: 3.4"
Status: near western quadrature

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

Rektascensija: 20h51m03s
Deklinacija: -18°18'53"

Neptune

Fair
Regimasis ryškis: 7.9
Žvaigždynas: Aquarius
Angular diameter: 2.2"
Status: near western quadrature

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

Rektascensija: 20h10m27s
Deklinacija: -19°44'56"

Moon

Excellent
Regimasis ryškis: -12.7
Žvaigždynas: Scorpius
Angular diameter: 11468.2"
Status: Moon illumination 14.0%

Observation tip: Moon illumination 14.0%; good for observing lunar surface detail

Rektascensija: 14h33m41s
Deklinacija: -09°56'09"