2021, January 9: Mercury, Jupiter, and Saturn, Evening Watch

Jupiter, Saturn, and Mercury, January 9, 2021. Mercury joins Jupiter and Saturn 20 days after their great conjunction. Planets align.
2021: January 9: Jupiter and Saturn are low in the southwest after sunset. Jupiter is 2.2° to the upper left of Saturn. Mercury is 2.6° to the lower left of Saturn.

January 9, 2021:  Mercury makes a pretty triangle with Jupiter and Saturn, nearly 3 weeks after the giant planets’ great conjunction.

by Jeffrey L. Hunt

Chicago, Illinois:  Sunrise, 7:18 a.m. CST; Sunset, 4:39 p.m. CST.  Check local sources for sunrise and sunset times for your location.

Speedy Mercury is with Jupiter and Saturn low in the west-southwest at about 30 minutes after sunset.  Because of the bright twilight, use a binocular to first locate bright Jupiter.  Saturn is 2.2° to the lower right of the Jovian Giant.  Mercury, brighter than Saturn and dimmer than Jupiter is 1.6° to the lower left of Saturn and 2.8° below Jupiter.

The planets are setting early; this makes the window small to observe them before they disappear below the horizon.

Detailed Note: Thirty minutes after sunset, Jupiter, about 7° up in the west-southwest is 2.2° to the upper left of Saturn. Use a binocular to locate them, especially Saturn.  Mercury (m = −0.9) makes a pretty triangle with Jupiter and Saturn.  It is 1.6° to the lower left of Saturn and 2.8° below Jupiter.  As the sky darkens further, Mars is nearly 60° up in the south-southeast, 4.3° to the upper left of ο Psc and 6.4° below γ Ari. Read about Mars during January.

Read more about the planets during January.

Moon in the Bull's Horns. October 8, 2020

2021, August 14: Waxing Moon, Stellar Double

August 14, 2021: This evening the waxing moon is near Zubenelgenubi, the southern claw, that is a stellar double.  Use a binocular to see both stars that are in a gravitation dance.

Moon and Venus, August 15, 2020

2021, August 13: Evening Sky, Bright Planets

August 13, 2021: This evening the crescent moon appears between Evening Star Venus and Spica as the lunar slice dances eastward.  Jupiter and Saturn are in the southeastern sky.

The crescent moon, November 19, 2020

2021, August 12: Evening Sky, Lunar Dance

August 12, 2021: This evening the crescent moon appears between Venus and Spica as the lunar slice dances eastward.

2021, May 13: The crescent moon is 3.2° to the upper left of Mercury.

2021, August 11: Waxing Moon, Evening Star

August 11, 2021:  The waxing crescent moon is to the upper left of Evening Star Venus this evening in the western sky.

The Crescent Moon, November 16, 2020

2021, August 10: Evening Star Venus, Crescent Moon

August 10, 2021:  The crescent moon is near Venus in the western sky after sunset.



Categories: Astronomy, Sky Watching

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