March 10, 2021: The crescent moon appears with Jupiter, Mercury, and Saturn during bright morning twilight in the east-southeast.
by Jeffrey L. Hunt
Chicago, Illinois: Sunrise, 6:10 a.m. CST; Sunset, 5:52 p.m. CST. Check local sources for sunrise and sunset times for your location.
This morning the crescent moon joins Saturn, Jupiter, and Mercury in the east-southeast before sunrise. The quartet can be found low in the sky between 45 and 30 minutes before sunrise. At the earlier time, Saturn is 8.0° above the east-southeast horizon. Jupiter is slowly moving away from Saturn. It is 9.2° to the lower left of the Ringed Wonder. Jupiter is the brighter of the two.
As the sky brightens, Jupiter, Mercury, and the lunar slice come into view. The thin crescent moon is only 9% illuminated. It appears 5.4° to the lower right of Jupiter.
Mercury is low in the sky as well, 4.4° to the lower left of Jupiter.
A binocular is necessary to see the morning grouping of the quartet as the sky brightens from the approaching sunrise.
Having a view of a clear, unobstructed horizon is important to see the morning planets and the moon.
Detailed Note: Forty-five minutes before sunrise, Saturn is 8.0° up in the east-southeast, Jupiter is 9.2° of ecliptic longitude east of Saturn. The Giant planet is nearly 4° in altitude. Fifteen minutes later, Jupiter is over 6° in altitude. Use a binocular to spot Mercury, 4.4° to the lower left of Jupiter. Mercury is only 4° in altitude. The thin crescent moon (26.7d, 9%) is nearly 4° in altitude, 5.4° to the lower right of Jupiter. One hour after sunset. Mars is 57.0° up in the west-southwest among the clustered starfields of Taurus. The planet is nicely placed to the right of Aldebaran and the Hyades, and to the upper left of the Pleiades. The planet is 0.3° above 37 Tau.
Read more about the planets during March 2021.
- 2023, October 20: Jupiter’s Double Shadows, Mercury at Superior ConjunctionOctober 20: After midnight, Jupiter’s moons’ shadows dance across the cloud tops. Mercury is at superior conjunction.
- 2023, October 19: Poured Moon, See Planet UranusOctober 19: Sagittarius seems to pour the moon into the sky this evening. Find Uranus with a binocular.
- 2023, October 18: Moon-Antares Conjunction, Bright PlanetsOctober 18, 2023: The moon is near Antares after sunset. Venus, Jupiter, and Saturn are in the sky during the nighttime hours.
- 2023, October 17: Scorpion MoonOctober 17, 2023: The crescent moon is with Scorpius during evening twilight. Venus and Jupiter gleam from the predawn sky.
- 2023, October 16: Venus in Starry ConjunctionOctober 16, 2023: Venus passes a star in Leo before sunrise. A crescent moon is low in the western sky during evening twilight.