>- If in a circular orbit and you fire an essentially instantaneous
>retrograde burn (rockets fire forward along the orbital path), you will
 ...
>    - now be at the Apogee (highest point) of an elliptical orbit
>    - lower the Perigee (lowest point) even more, which will now be exactly
>on the other side of the planet.
 ...
>If you fire a Posigrade (rockets fire behind you along the path of your
>orbit) burn at Perigee you can "circularise" your orbit (Alice's Hohman
>transfer orbit.)


Problem.
My retrograde firing lowered the other side of the orbit, creating
a perigee.  Now I want to lower the apogee to make the new smaller
orbit circular.  So I go around to perigee and fire again.
Posigrade?
Drops the Apogee?  Not in my simple mind. (Here we go again...)

Barry

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