2024, April 4:  Look for Mars

The moon is near Mars as it passes the morning planets, April 16, 2020.
2020, April 16: The moon is 3.8° to the lower left of Mars. The morning planets span 15.1°.

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by Jeffrey L. Hunt

Chicago, Illinois: Sunrise, 6:28 a.m. CDT; Sunset, 7:20 p.m. CDT.  Check local sources for sunrise and sunset times. Times are calculated by the US Naval Observatory’s MICA computer program.

Partial Solar Eclipse 2012
Photo Caption – 2012, May 20: Partial solar eclipse.

During Monday’s eclipse, look for Venus and Jupiter.  As the moon covers a larger chunk of the solar disk, remove your eclipse glasses, extend your open hand to cover the sun, and look for the bright planets.  Venus is to the sun’s lower right and Jupiter to the upper left.  Venus is easier to locate, about 15° from the sun.  Jupiter is nearly double Venus’ solar elongation or angle.

Summaries of Current Sky Events
Summary for Venus as a Morning Star, 2023-24

Here is today’s planet forecast:

Morning Sky

Look for Mars

Look for Mars
Chart Caption – 2024, April 4: Mars and the moon are in the eastern sky during morning twilight.

Forty-five minutes before sunup, the crescent moon, 25% illuminated, is over 10° above the southeast horizon.  During mid-twilight, the morning crescent is a pretty sight, beautifully shining through the colorful hues.

2024, February 7: Moon with Earthshine
Photo Caption – 2024, February 7: Moon with Earthshine

Look for earthshine on the night portion, between the cusps or horns. The effect is from sunlight that reflects from Earth’s features.  Photograph it with a tripod-mounted camera with exposures up to a few seconds.

Attempt to look for Mars, nearly 25° to the moon’s lower left.  At this hour, it is 5° above the east-southeast horizon.  It is marginally visible, depending on local sky conditions.  Use a binocular to initially find it?  Can you see it without the optical assist?

Saturn, less than 5° to Mars’ lower left, is too low and not bright enough for easy visibility.  The first attempt to see Saturn is on the 10th, when Mars passes close by.

Venus, rising 28 minutes before the sun is bright, but difficult to see in the predawn light.

Evening Sky

Jupiter and Mercury

2024, April 4: Jupiter is in the western sky after sundown, below Aldebaran, Pleiades and Hyades.
Chart Caption – 2024, April 4: Jupiter is in the western sky after sundown, below Aldebaran, Pleiades and Hyades.

After its best evening appearance of the year, Mercury is dim, setting 62 minutes after the sun. It overtakes our planet, passing between Sun and Earth on the 11th.  Then it moves into the eastern predawn sky for an unfavorable appearance for northern hemisphere sky watchers.

Bright Jupiter is the easiest bright planet to see.  It is “that bright star” in the west after sundown.  At 45 minutes after nightfall, it is about 20° up in the west.

The Jovian Giant is moving eastward in front of Aries, over 15° to the upper left of Hamal, the constellation’s brightest star.

By an hour after sundown, other stars in Jupiter’s region are visible, such as Aldebaran, Pleiades, and Hyades.  Look at them through a binocular as well as attempt to see some of Jupiter’s four largest moons.

Jupiter and Uranus

2024, April 4: Jupiter and Uranus are in the same binocular field of view after sunset.
Chart Caption – 2024, April 4: Jupiter and Uranus are in the same binocular field of view after sunset.

Jupiter and Uranus are in the same binocular field.  Uranus is relatively easy to see, even in a suburban setting with many outdoor lights.  Place Jupiter near the center of the field.  Look for Rho Arietis (ρ Ari on the chart) to Jupiter’s right.  The star is inside a triangle of three dimmer stars.  Depending on the binocular’s field of view, Delta Arietis (δ Ari) is near the upper right edge of the field. 

Look for dim 53 Arietis and 54 Arietis between Jupiter and Delta.  They are nearly in line with the planet and the brighter star.  Notice that 53 is blue-white, while 54 is topaz, similar to Delta.

Uranus, slightly brighter than 53 and 54, is to the upper left of the former and to the left of the latter.  The planet is aquamarine.  A telescope is needed to see its globe.

Jupiter overtakes Uranus on the 20th, but the planets are low in the west-northwest after sunset.

This evening Jupiter sets less than three hours after sunset and long before midnight.

Tomorrow morning, the crescent moon is closer to Mars, but not in the same binocular field.

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