Archive for January 13, 2021

01/13/2021 – Ephemeris – Let’s take a look for the naked-eye planets for this week

January 13, 2021 Leave a comment

This is Bob Moler with Ephemeris for Wednesday, January 13th. Today the Sun will be up for 9 hours and 8 minutes, setting at 5:26, and it will rise tomorrow at 8:16. The Moon is new today, and won’t be visible.

Let’s take a look for the naked-eye planets for this week. Mercury has joined Jupiter and Saturn extremely low in the southwestern sky. I’m afraid Saturn will be lost in the twilight, but Jupiter, with Mercury above it might be visible. They are both extremely low in the southwestern sky around 6 pm. Jupiter will set at 6:20 pm with Mercury following 20 minutes later. Quite high in the south at 7 pm Mars can be found. It will be actually due south on the meridian at 7:10 pm tonight. The meridian is an imaginary line that runs from the north compass point on one’s horizon, through the zenith to the south compass point. Mars is beginning to increase its speed eastward and will set at 2:09 am. Venus, our brilliant morning star will rise at 7:15 am in the east-southeast.


Jupiter and Mercury in evening twilight

Jupiter and Mercury in evening twilight st 6 pm, about a half hour after sunset over the Lake Michigan horizon. Saturn, though present can’t compete with the bright twilight. The less than one day old moon is setting. Created using Stellarium.

Mars finder animation

Mars finder animation for 8 pm tonight, January 13, 2021 (about 2 1/2 hours after sunset. Looking southward. Created using Stellarium and GIMP.

Venus in the morning twilight

Venus in the morning twilight at 7:45 am tomorrow morning January 14, 2021 (about 1/2 hour before sunrise). Created using Stellarium.

The graphic that shows the planets as seen in small telescopes has been discontinued because Jupiter and Saturn are too close to the horizon and Venus and Mars are too small (less than 10 seconds of arc in diameter). It will be resumed in a couple of months when Jupiter and Saturn become visible in the morning sky.

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 January 13, 2021. The night ends on the left with sunrise on the 14th. I’m afraid that the labels for Jupiter and Saturn will overlap, since the planets are very close. Click on the image to enlarge. Created using my LookingUp program.