Question about aerobraking.

[TheScareCake!]

So, if i want to get to ike with aerobraking at duna, how should i do it?

[TMS]

Use this: http://alterbaron.github.io/ksp_aerocalc/

Wait until you enter Duna's SOI and then enter your current orbital parameters into the appropriate fields. The most important field is your orbital velocity.

Your desired apoapsis will be something like 3,200,000m to match Ike's orbit.

The calculator will probably suggest an aerobraking periapsis somewhere in the region of 13-14km.

[cantab]

You can figure out what your orbital speed will be at some point on your projected course by placing a manoeuvre node there, dragging the retrograde handle until it starts to switch with the prograde, then reading off the delta-V for the manoeuvre which will be the same as your orbital speed. You may also be able to figure out the altitude as it will be the apoapsis of the post-manoeuvre trajectory, otherwise just guesstimate it.

You should probably refine things once you're in the target's SOI anyway mind, but this may be a useful general trick.

[Jimor]

Ahh, that's a very good trick, cantab. I really like it when there are ways of getting useful information in vanilla KSP that's otherwise not directly in front of you.