Archive for June 29, 2022

06/29/2022 Ephemeris – Let’s search for the naked-eye planets for this week

June 29, 2022 Comments off

This is Ephemeris for Wednesday, June 29th. Today the Sun will be up for 15 hours and 32 minutes, setting at 9:32, and it will rise tomorrow at 6:00. The Moon, 1 day past new, will set at 10:32 this evening.

Let’s search for the naked-eye planets for this week. All the naked-eye planets are in the morning sky, although Mercury is too close to the Sun to be seen. At 5 am tomorrow the planets will be spread out from Mercury invisible on the horizon, brilliant Venus low in the east-northeast to Saturn higher in the south. To the right and above of Venus, in the east-southeast, will be the Mars. Jupiter is in the southeast. Mars is dimmer than Jupiter, but is slowly getting brighter as the Earth is slowly advancing on it. Saturn ends the line of planets in the south. By tomorrow night, Saturn will rise a minute before midnight. It won’t be an official evening planet until it rises before sunset. That won’t happen until mid-August.

The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). They may be different for your location.


The morning planets tomorrow morning

The morning planets at 5 am tomorrow morning, June 30, 2022. The planets actually appear in a straight line in the sky, being placed along the ecliptic, or path of the Sun in the sky. The ecliptic is a great circle on the celestial sphere. Click on the image to enlarge it. The span of the planets from Venus to Saturn is 114 degrees. Click on the image to enlarge it. Created using Stellarium.

The image above was plotted using the Miller cylindrical projection. While the azimuths are correct, the other plots are not. The planets actually appear to be in a straight line in the sky. I’ve finagled a stereographic projection to show that fact, as seen below.

Morning planets seen in a stereographic view

Distortions of rendering a spherical sky on a flat plane. The morning planets as seen in a stereographic view where great circles, like the ecliptic and horizon, are either circles or straight lines. In this image, the ecliptic, orange line, runs through the center of the plot, so it appears straight. In the real sky, both the planets and the horizon appear to be in straight lines. This assumes that your horizon is flat. Created using Stellarium.

Telescopic views of Venus, Saturn and Jupiter

Views of Saturn, Jupiter, and Venus (north up) as they would be seen in a small telescope, with the same magnification, tomorrow morning at 5:00 am, June 30, 2022. I do not show planets less than 10 seconds of arc in diameter. Apparent diameters: Saturn 18.16″, its rings 42.31″; Jupiter 40.75″. Mars is not shown, its apparent diameter is 7.20″ and is 85.7% illuminated; Venus 11.91″, 85.8% illuminated. Jupiter’s moon  Io will be behind the planet at that time. The ” symbol means seconds of arc (1/3600th of a degree.) Created using Cartes du Ciel (Sky Charts).

Planets and the Moon on a single night

The naked-eye planets and the Moon at sunset and sunrise on a single night, starting with sunset on the right on June 29, 2022. The night ends on the left with sunrise on the 30th. Notice that all the naked-eye planets are in the morning sky now. Click on the image to enlarge it. Created using my LookingUp program.