semiminoraxis and orbital circumference   With the values of aphelion distance and perihelion distance from this article i calculate the semiminoraxis to     km believe me  i used my by me developed equation  b  sqr  aph  per    aph  per    but i dont want to explain the equation  its hard to write for me in english  test and compare it with every other accepted equation for this planet and if you want for any other planet and objekt  you will see  im right With the same equation you can calculate the semiminoraxis for article of planets which only give the semiMAJORaxis For the orbital circumference i have calculated with numerical integration the very exact value of     km  test and compare it with the exact values of the semimajoraxis and semiminoraxis on this link  httpwwwmathematikchanwendungenmathnumint  or any other exact equation for the circumference of an ellipse you will see im right  I cant make the changes in this article because im only signed up at the german wikipedia But if nobody make this mathematically correct changes in this article maybe i sign up here and make the changes for all planets who gives the aphelion and perihelion distances but only the semimajoraxis and not the semiminoraxis  and just a notexactly orbital circumference like in the mercuryarticle Lots of Greets from Austria Pygmalion  February    CET