2021: Venus as an Evening Star – The Chart

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This chart displays the setting time intervals for the bright planets, moon, and bright stars near the ecliptic compared to sunset. Conjunctions with Venus and groupings with the moon are identified.

The chart above displays the setting time of Venus (green curve) compared to sunset.  The three phases of twilight are displayed as well. The setting time differences are displayed for bright stars near the ecliptic as well as other bright planets.  The moonset interval is displayed with circles.  The rising time difference – compared to sunset – is displayed for Jupiter and Saturn as well. When the planets rise at sunset, they are at opposition.

Venus as an Evening Star, semi-technical summary.

Saturn’s opposition with Venus is displayed as a brown box on the Saturn Rising line.  A yellow box on the Jupiter Rising line indicates a similar event, Venus – Jupiter opposition.  In the evening, when two planets are at opposition, opposite sides of Earth, one is rising as the other sets.  A week or so after these dates Saturn, then Jupiter, appear in the eastern sky as Venus shines from the west.  In this study of Venus, this trio is in the sky together during evening hours until nearly the end of its evening appearance during early 2022.

When the Venus curve crosses another line, Venus and that celestial object set at the same time.  Conjunctions occur near this date.  White boxes on the charts indicate conjunctions with stars and other planets.  The yellow triangle, with the letters “GE,” indicates the greatest elongation dates of Venus and Mercury.

The setting chart is from data by the U.S. Naval Observatory’s Multiyear Interactive Computer Almanac (MICA) for Chicago, Illinois.  Make any appropriate adjustments for different latitudes.  Time intervals after sunset are used in the following notes for observers to determine the appropriate observing clock time at their locations.

Venus as an Evening Star Article

2021, April 25: Mercury-Venus Conjunction, Mars, Bright Moon

April 25, 2021: Mercury passes Evening Star Venus this evening after sunset.  Look low in the western sky about 20 minutes after sunset.  Mars is marching eastward in Gemini, near the star cluster Messier 35.  The bright moon is near Spica.

2021, April 24: Evening Star, Bright Mercury, Venus, Mars, Gibbous Moon

April 24, 2021:  Brilliant Evening Star Venus and bright Mercury are entering the evening sky.  They are low in the west-northwest during evening twilight.  The bright moon is in the southeast in Virgo.  Mars moves into Gemini as it approaches the star cluster Messier 35.

2021, April 24: Lunar Occultation, Morning Planets, Jupiter Saturn

April 24, 2021:  The bright gibbous moon is near a star in Virgo during the early morning.  From parts of the Western Hemisphere, the moon covers the star.  Before sunrise, bright morning planets, Jupiter and Saturn are in the southeast before sunrise.

2021, April 23: Evening Star Venus, Mercury, Mars, Moon

April 23, 2021: Evening Star Venus and Mercury are entering the evening sky.  They are found very low in the west-northwest after sunset.  The bright moon is in the southeastern sky during the early evening.  Mars is moving toward the star cluster Messier 35.



Categories: Astronomy, Sky Watching

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2 replies

  1. Krukarius – Geographer, photographer and tourist. I am interested in amateur astronomy also. I would like to share my unique ideas and point of view with you.

    How do you make these maps? They are brilliant!

    • Jeffrey L. Hunt – Jeffrey L. Hunt is an educational technologist living in suburban Chicago. When he's not learning about and implementing technology in classes, he's running or looking at the stars.

      The rising and setting charts are made from data from the US Naval Observatory’s computer program, MICA. The data is then plotted with Microsoft Excel. Captions and comments are then added with text boxes. Thanks for the compliment.

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