Celestia Forums

Posted: **11.08.2018, 08:16**

Hi

How to mark perihelium aphelium in orbits?

Adam

Posted: **13.08.2018, 16:25**

perhaps by creating Reference Point as for L1, L2, L3, L4 …
example (code of (c) Phil Batchelor, 2007-2012)

ReferencePoint   "Earth-L1" "Sol/Earth"
{
   Class "spacecraft"
   Visible   true
   Clickable   true

   OrbitFrame
   {
      TwoVector
      {
         Center   "Sol/Earth"
         Primary
         {
            Axis "x"
            RelativePosition { Target "Sol" }
         }
         Secondary
         {
            Axis "y"
            RelativeVelocity { Target "Sol" }
         }
      }
   }

   FixedPosition [ 1496553.588 0.0 0 ]
}

you need to know his spatial position (x,y,z) if it is stable.

:hi: