April 12, 2021: Jupiter and Saturn are morning planets. Jupiter is the brightest “star” in the southeast before sunrise. Saturn is to Jupiter’s upper right. Use a binocular to spot the dim stars.
by Jeffrey L. Hunt
Chicago, Illinois: Sunrise, 6:15 a.m. CDT; Sunset, 7:29 p.m. CDT. Check local sources for sunrise and sunset times for your location.
Before sunrise, Jupiter is the brightest “star” in the southeast. One hour before sunup, it is nearly 11° above the horizon. Saturn is dimmer and 13.1° to the upper right of Jupiter.
Make a fist and hold it up to the sky at arm’s length. The distance across your fist from thumb to pinky finger is approximately 10°. Your fist will fit between the two planets when held against the sky.
Use a binocular to note the planets’ places compared to the starry background. Saturn is to the upper right of Theta Capricorni (θ Cap in the chart).
Jupiter is moving eastward compared to three stars, Deneb Algiedi (δ Cap), Mu Capricorni (μ Cap), and Iota Aquarii (ι Aqr). In a few mornings Jupiter’s moons will seem to mix with Mu Capricorni.
Find your spotting scope or small telescope to watch the planet and its moons interplay with the star.
Detailed Note: One hour before sunrise, Jupiter is nearly 11° in altitude above the east-southeast horizon. Dimmer Saturn is 13.1° to the upper right of the Jovian Giant. Among the stars of Capricornus, Jupiter is 2.4° to the upper left of Deneb Algiedi and 0.7° to the upper right of Mu Capricorni (μ Cap, m = 5.1). Saturn is 1.9° to the upper right of θ Cap. Use a binocular to spot the dimmer stars. Spica (α Vir, m = 1.0) rises at sunset. One hour later, find it about 10° up in the east-southeast. Farther westward, Mars is less than halfway up in the sky in the west in front of the stars of Taurus. It is nearly between the horns of the Bull. The planet is 4.0° to the lower left of Elnath and 3.9° to the upper right of ζ Tau.
Read more about the planets during April 2021.
April 19, 2021: The first evening appearance of Venus for this apparition occurs this evening. Look for it low in the west-northwest about 20 minutes after sunset.
April 19, 2021: Venus begins to appear in the west after sunset. The moon lines up with Pollux and Castor, while Mars is above Bull’s horns in the western evening sky.
April 19, 2021: The bright morning planets, Jupiter and Saturn, are in the southeastern sky before sunrise. Capricornus is the starry background for this giant planet duo.
April 18, 2021: The crescent moon is high in the west after sunset among the stars of Gemini, below Pollux and Castor. Mars is above the Bull’s horns. Daylight is 13 hours, 30 minutes long.
April 18, 2021: The bright morning planets, Jupiter and Saturn, are in the southeastern sky before sunrise. Capricornus is the starry background for this giant planet duo. Daylight is 13 hours, 30 minutes long.