Archive for September 12, 2018

09/12/2018 – Ephemeris – Wednesday is bright planet day on Ephemeris

September 12, 2018 Comments off

Ephemeris for Wednesday, September 12th. The Sun will rise at 7:18. It’ll be up for 12 hours and 40 minutes, setting at 7:59. The Moon, 3 days past new, will set at 9:56 this evening.

It’s Wednesday again and time to look at the bright planets. Four of them are visible in the evening sky. The brilliant Venus will be visible in the western twilight from about 8:20 p.m. until it sets at 9:03 p.m. Jupiter will be in the southwest as it gets dark. It is only outshone by Venus, and the Moon, and is again brighter than Mars. Jupiter will set at 10:16 p.m. Saturn will start the evening low in the southern sky and will stay relatively low, above the Teapot of Sagittarius. It will be due south at 8:28 p.m. and will set at 12:51 a.m. Mars will be low in the south-southeast as the skies darken tonight. and is now 46.4 million miles (74.6 million km) away. Mars will be due south at 10:29 p.m., and it will set at 2:43 a.m.

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


Evening planets

The evening planets at 8:30 p.m. September 12, 2018. Click on image to enlarge. Created using Stellarium.

Binocular Moon

The crescent Moon as it should appear tonight in binoculars. Created using Stellarium.

Telescopic Planets

Venus, Jupiter, Saturn and Mars with the same magnification at 8:30 p.m. September 12, 2018. Yes, your eyes don’t deceive you, Venus is larger than Jupiter. Venus is 34.9 ” (seconds of arc) in diameter, while Jupiter is 33.8″. Venus is approaching us, while Jupiter is being left behind by the Earth. Mars is also shown enlarged. The global dust storm is abating, so the albedo features are beginning to be seen. 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 September 12, 2018. The night ends on the left with sunrise on the 13th. Click on the image to enlarge. Created using my LookingUp program.