Archive for July 31, 2019

07/31/2019 – Ephemeris – Looking at the bright planets on this last day of July

July 31, 2019 Comments off

Ephemeris for Wednesday, July 31st. Today the Sun will be up for 14 hours and 42 minutes, setting at 9:10, and it will rise tomorrow at 6:28. The Moon is new today, and won’t be visible.

Let’s look at the planets for the last day of July. Mars, Mercury and Venus are all too close to the Sun to be seen. Mars is still on the evening or east side of the Sun. Mercury and Venus are on the west or morning side of the Sun. Bright Jupiter will be in the southern sky as it gets dark. It will pass the meridian, due south at 9:58 p.m. With steadily held binoculars a few of the 4 largest satellites of Jupiter can be seen. Three of Jupiter’s largest satellites can be spotted in telescopes tonight. One, Ganymede will be passing in front of the planet tonight. Jupiter will set at 2:26 a.m. Saturn, the ringed planet, will be lower down in the southeast in the evening, the brightest star-like object in that direction, but significantly dimmer than Jupiter. It will set at 4:40 a.m.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.


Evening planets

Jupiter and Saturn with the constellations of the southern summer sky at 10:30 p.m. July 31, 2019. Click on the image to enlarge. Created using Stellarium.

Telescopic planets

Jupiter and Saturn with the same magnification at 11p.m. July 31, 2019. Jupiter’s moon Ganymede is about to transit the face of Jupiter. The transit starts at 11:11 p.m. and ends at 1:32 a.m. Despite how they appear here Jupiter’s moons are dimmer than the planet. The same is true for Saturn’s moons, however Titan is much brighter than the other moons. Created using Cartes du Ciel (Sky Charts).

Planets and the Moon on a single night

Planets and the Moon at sunset and sunrise of a single night starting with sunset on the right on July 31, 2019. The night ends on the left with sunrise on August 1st. Click on the image to enlarge. Created using my LookingUp program.