2020, September 25: Saturn and Moon

Saturn, Moon, Jupiter, September 25, 2020
September 25: One hour after sunset, the moon is 3.7° to the lower left of Saturn.

During early evening hours of September 25, the moon appears near Saturn in the southern sky.

by Jeffrey L. Hunt

During the evening hours of September 25, the moon appears 3.7° to the lower left of Saturn.  The gibbous moon is over 70% illuminated.

Jupiter, Saturn, Moon, September 25, 2020.
2020, September 25: The gibbous moon (overexposed in the photo) appears 3.7° to the lower left of Saturn. Jupiter is 7.6° to the lower right of Saturn.

Jupiter is 7.6° to the lower right of Saturn. 

As seen from the sun, Jupiter passes Saturn in a heliocentric conjunction on November 2. This is a prelude to the Great Conjunction on December 21, when Jupiter passes very closely to Saturn. While the planetary pair appears close in the sky, they are hundreds of millions of miles apart in space.

A Great Conjunction occurs every 19.6 years. The last one occurred in 2000. The next Jupiter – Saturn conjunction occurs October 31, 2040, when the two planets rise into the eastern morning sky. The gap is 1.1°. At this year’s conjunction, the two planets appear ten times closer.

While other conjunctions have occurred, this year’s conjunction is the closest Jupiter – Saturn conjunction since 1623.  That year’s conjunction occurred after the invention of the telescope and during very bright evening twilight.  Read our article about whether it was observed.

Read more about the planets during September and October.

RECENT ARTICLES

2021, December 6: The moon with earthshine.

2022, July 31:  Morning Planets, Evening Earthshine

July 31, 2022: Venus, Mars, Jupiter, and Saturn are scattered across the plane of the solar system before sunrise.  The crescent moon, displaying earthshine, is visible in the west after sundown.

Keep reading
2020, September 4: Venus, Sirius, Procyon, and Orion

2022, July 30: Triangular Saturn, Evening Moon

July 30, 2022: Saturn forms an interesting triangle with two stars in Capricornus before daybreak.  Venus, Mars, Jupiter, and Saturn parade in the morning sky. The thin crescent moon is in the west-northwest after sunset.

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

2022, July 29: Jupiter Retrogrades, Meteor Shower, Planets Parade

July 29, 2022: Jupiter’s retrograde begins today.  The Southern Delta Aquariid meteor shower peaks after midnight.  Four morning planets parade across the sky.  Catch a glimpse of Mercury after sunset.

Keep reading


Categories: Astronomy, Sky Watching

Tags: , , , , ,

Leave a Reply

%d bloggers like this: