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View Full Version : Jupiter & Venus positions in June ?

7he4uthor
2012-Mar-10, 08:41 PM
I read a year ago that around the 7th of June [2012] that Jupiter & Venus will be on opposite sides of the sun.
Any confirmation on this ?

slang
2012-Mar-11, 12:57 AM
You can check this using the Solar System Live (http://www.fourmilab.ch/cgi-bin/Solar/action?sys=-Sf) simulator, and enter the date you're interested in. If you do this (and change the default size of 320 to say, 1024) you'll see that Venus and Jupiter are roughly on opposite sides of the sun.

Tobin Dax
2012-Mar-11, 02:38 AM
That would happen once per 7-8 months, since Venus takes about that long to orbit the sun. Jupiter moves, too, but at a much slower rate.

Centaur
2012-Mar-11, 06:53 PM
I read a year ago that around the 7th of June [2012] that Jupiter & Venus will be on opposite sides of the sun.
Any confirmation on this ?

On 2012 JUN 07 at 12:00 UT the difference in the geometric heliocentric ecliptical longitudes of Venus and Jupiter will be 157.37°. Precisely opposite by that type of measurement is 180°, which will occur on 2012 MAY 23 at 10:10 UT.

Glom
2012-Mar-11, 08:15 PM
Boy they are close tonight.

Centaur
2012-Mar-11, 08:41 PM
Boy they are close tonight.

Indeed, Glom, and they will appear their closest at 3° angular separation on Tuesday. The OP was seemingly referring to their directions relative to a fictional observer on the Sun. I would like to know from the OP why this mattered to him.

Centaur
2012-Mar-11, 10:35 PM
I created a slightly more complex program that determines the direct geometric (light time not considered) angular separation between Venus and Jupiter as viewed from the Sun's center, i.e. in spherical space and not simply projected onto the ecliptic plane. The upcoming greatest separation of 179.63° will come on 2012 MAY 23 at 10:30 UT. By that standard the separation will be 157.35° on 2012 JUN 07 at 12:00 UT. To follow up on Tobin Dax's excellent point, the mean synodic (lapping) period between Venus and Jupiter is 236.992 days, which is a little less than eight months.

Centaur
2012-Mar-11, 10:44 PM
I read a year ago that around the 7th of June [2012] that Jupiter & Venus will be on opposite sides of the sun.
Any confirmation on this ?

If you actually meant as viewed from Earth, they both will appear west of the Sun on that date. Although Venus will appear too near the Sun to be seen.