2020, December 18: Venus in Close Conjunction with Beta Scorpii

2020, December 18: Before sunrise, brilliant Morning Star Venus is 0.1° to the upper left of Graffias (β Sco).

December 18, 2020: As an opening act to the Great Conjunction, Venus passes the star Beta Scorpii at a distance slight larger than the closest distance of Jupiter and Saturn.

by Jeffrey L. Hunt

Chicago, Illinois:  Sunrise, 7:14 a.m. CST; Sunset, 4:22 p.m. CST.  Check local sources for sunrise and sunset times for your location.

Venus moves into Scorpius, crossing it in four days. The section of the famous constellation where the planets move is very small and Venus moves quickly.

Find the planet low in the southeast about 45 minutes before sunrise.  It is very close to Graffias (β Sco), the Crab, only 0.1° away from the star.  The morning conjunction is an opening act for the Jupiter – Saturn conjunction in a few evenings.

The distance between Venus and the star is a little larger than the Jupiter – Saturn conjunction distance on Great Conjunction evening.

Unlike slow-moving Jupiter and Saturn, Venus moves quickly and the gap between the planet and the star is much wider tomorrow morning – 1.3°.

Can you see the star and the planet without optical help from a binocular?  This is a gauge as to whether you can see Jupiter and Saturn as separate “stars” in the sky on Great Conjunction evening.  Your eyes may need a little assistance from a binocular to see the planets separately.

Detailed Note: Venus moves into Scorpius.  It crosses the constellation in four days.  Forty-five minutes before sunrise, Venus – over 10° up in the southeast – is 0.1° to the upper left of β Sco. Use a binocular to observe that the brilliant planet is 1.4° to the upper right of Nu Scorpii (ν Sco, m = 4.0) and 1.0° to the upper left of Omega1 Scorpii (ω1 Sco, m = 3.9). 

See our summary about Venus during December 2020 and the feature article  about Venus as a Morning Star.

Read more about the planets during December.

2021, April 18: Crescent Moon, Mars, Evening Sky

April 18, 2021:  The crescent moon is high in the west after sunset among the stars of Gemini, below Pollux and Castor.  Mars is above the Bull’s horns.  Daylight is 13 hours, 30 minutes long.

2021, April 18: Jupiter, Saturn, Morning Planets

April 18, 2021: The bright morning planets, Jupiter and Saturn, are in the southeastern sky before sunrise.  Capricornus is the starry background for this giant planet duo.  Daylight is 13 hours, 30 minutes long.

Categories: Astronomy, Sky Watching

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