planet watch
above the solar system
Volume 23 -- Issue 6
Above the Solar System -- June 2017

Name June 10 June 20 June 30
Mercury 020o 37' 080o 23' 139o 48'
Venus 307o 00' 322o 49' 338o 40'
Earth 259o 19' 268o 52' 278o 25'
Mars 102o 31' 107o 13' 111o 53'
Ceres 075o 92' 078o 12' 080o 33'
Jupiter 203o 01' 203o 46' 204o 32'
Saturn 264o 20' 264o 38' 264o 56'
Plot planet positions using polar graph paper that you can download from this web site - or at that web site create your own.

This uses a coordinate system called heliocentric longitude where the 0o point is at the June or Vernal Equinox coordinate of 0 hours Right Ascension. From 0o longitude an object's orbit around the Sun and its heliocentric longitude increase at a rate determined by the orbital speed of the particular planet. The planet motion is counterclockwise as the animation below shows. Using the coordinates provided here a planet position June be plotted using degrees ranging from (0o to 360o) of heliocentric longitude. Once plotted the orbital position of one planet could be compared with that of another planet. Or the relative orbital speeds of an inner planet could be compared with that of an outer planet.

Terrestrial Planets and Dwarf Planet Ceres in Motion at 5 day intervals.
Above the Terrestrial Planets - June 2017

Click here to see an animated graphic showing the
Terrestrial Planets orbiting the Sun during 2017.

Explore our Solar System with this really cool tool. Click here to go to the Solar System Scope web site.