Aerobraking Altitude above Duna?

[OscarJade]

What is the best altitude to safely do this? I need to save some fuel...

[Boomerang]

The best aerobraking altitude depends on your incoming velocity, your desired altitude after aerobraking, etc. This calculator gives pretty good results though:

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

Never hurts to quicksave first through and I very much doubt that the calculator will be any use with the upcoming aero model, but you're good for now.

[Scarecrow88]

Coming from Kerbin I find a periapsis at Duna of around 12500m is enough to aerobrake into a captured orbit.