Astronomy

2020, November 28: Evening Planets, Bright Moon

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2020, November 28: The bright moon is in the east, 10° to the right of the Pleiades star cluster and over 20° to the upper right of Aldebaran.

November 28, 2020: The Great Conjunction countdown: 23 days.  With a bright moon washing out the dimmer stars, Jupiter and Saturn are in the south-southwest and Mars is in the east as the night begins.

by Jeffrey L. Hunt

Chicago, Illinois:  Sunrise, 6:56 a.m. CST; Sunset, 4:21 p.m. CST.  Check local sources for sunrise and sunset times for your location.

The bright moon in the east washes out the dim stars in the sky, even those in the west.  The chart above shows a reasonable view of the stars in the moon’s immediate vicinity.  The Pleiades star cluster is about 10° to the left of the bright lunar orb.  Block out the moon’s glare with your hand to attempt to see the cluster. 

Ruddy Aldebaran is less than 20° to the lower left of the moon.

2020, November 28: In the east-southeast after sunset, Mars is 1.6° to the lower right of Epsilon Piscium (ε Psc) and 2.0° to the upper right of 80 Piscium (80 Psc).

2020, November 28: In the east-southeast after sunset, Mars is 1.6° to the lower right of Epsilon Piscium (ε Psc) and 2.0° to the upper right of 80 Piscium (80 Psc).

Mars is to the upper right of the nearly full moon, in the east-southeastern sky. The chart above is not realistic with the moon’s brightness, but a binocular reveals this starry background.   The Red Planet is 1.6° to the lower right of Epsilon Piscium (ε Psc on the chart) and 2.0° to the upper right of 80 Piscium (80 Psc).  With a binocular note that ε Psc, 80 Psc, and Zeta Piscium (ζ Psc) make a tiny, equilateral triangle.  Mars moves through the triangle during the next several evenings.

With Mars marching eastward compared to the planets, the nightly change in the planet’s location relative to the starry background is easy to spot.

2020, November 28: The Jupiter – Saturn gap is 2.4°. Saturn is 3.5° to the upper left of 56 Sagittarii (56 Sgr) and 4.8° to the lower right of Sigma Capricorni (σ Sgr). Jupiter is 1.9° to the lower left of 56 Sgr and 4.5° to the upper left of 52 Sagittarii (52 Sgr).

2020, November 28: The Jupiter – Saturn gap is 2.4°.

Farther west, the seemingly slow-motion Great Conjunction continues to unfold.  The two planets are about a quarter of the way up in the south-southwest as the sky darkens after sunset. Great Conjunction countdown: 23 days. Jupiter continues to close the gap to Saturn.  This evening they are 2.4° apart. 

In the starfield, Saturn is 3.5° to the upper left of 56 Sagittarii (56 Sgr on the chart) and 4.8° to the lower right of Sigma Capricorni (σ Sgr).  Jupiter is 1.9° to the lower left of 56 Sgr and 4.5° to the upper left of 52 Sagittarii (52 Sgr).  With that bright moon in the east, use a binocular to see the planets and the dim reference stars.

For more about Mars during November, see this article.

Detailed note: One hour after sunset. the bright gibbous moon (13.8d, 98%) is over 17° up in the east and over 10° to the right of the Pleiades.  Mars is nearly 37° in altitude in the east-southeast, 1.6° to the lower right of ε Psc and 2.0° to the upper right of 80 Psc.  The gap from Mars to δ Psc is 3.2°.  Farther west, Saturn is nearly 22° in altitude in the south-southwest, 2.4° to the upper left of Jupiter. Great Conjunction countdown: 23 days.  In the starfield, Saturn is 3.5° to the upper left of 56 Sgr and 4.8° to the lower right of σ Sgr.  Jupiter is 1.9° to the lower left of 56 Sgr and 4.5° to the upper left of 52 Sgr.

For more about the Great Conjunction, read our feature article. This is the closest Jupiter – Saturn conjunction since 1623.

Read more about the planets during November.

2020, December 7: Moon in Leo, Morning Star Venus, Jupiter Nears Saturn

In the morning before sunrise, the slightly gibbous moon is in Leo, between Regulus and Denebola. Brilliant Morning Star Venus is low in the southeast, stepping eastward in Virgo. With the Great Conjunction in two weeks, Jupiter is near Saturn in the southwest after sunset. Mars marches eastward among the stars of Pisces.

2020, December 6: Morning Star Venus, Gibbous Moon, Jupiter, Saturn, Mars

As morning twilight is in progress, the moon is high in the southwest among the stars of Leo. It is near the “Sickle of Leo. At the same hour Morning Star Venus is dancing eastward in Libran near Zubenelgenubi. In the evening Mars is in the southeast, marching eastward in Pisces. In the southwest, Jupiter approaches Saturn as a prelude to the Great Conjunction in 15 days.

2020, December 5: Morning Star Venus, Gibbous Moon, Evening Planets

During morning twilight brilliant Morning Star Venus shines from low in the east-southeast before sunrise as it steps eastward in front of the stars of Virgo. The gibbous moon lies in front of the stars of Cancer, between Leo and Gemini. In the evening sky. Jupiter continues to dance toward Saturn in a prelude to the Great Conjunction on December 21, 2020. In the east-southeast, Mars marches eastward among the dim stars of Pisces.

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