Lately I'm not getting very circular orbits, instead I get huge elliptical ones

[InF3RNo]

Hello, I don't know what's happening, I'm doing as always, waiting untli 10km, then head to 90º with my rocket and wait until 70-100km Periapsis, burn prograde on Apoapsis until I get a nice orbit but instead of that I'm getting really weird elliptical and fuel consuming orbits, how can I solve this problem? What am I doing wrong?

Picture explaining better the problem below:

Tried it again, but got much worse:

Weird thing is as you can see in the images I've already put 2 satellites in an almost perfect orbit, something must be really wrong.

Edited July 7, 2013 by InF3RNo
Setting as answered!

[stupid_chris]

You must not burn when your Periapsis is behind you, else that's what's gonna happen. You can either start burning a bit more towards the ground to push your periapsis further away, or try to get a better TWR on your rocket.

[InF3RNo]

I'll try burning 20 secs before I reach the Apoapsis, what's TWR?

[stupid_chris]

Usually you want to do half your burn before the maneuver node, and the other half after. TWR is your Thrust to Weight Ratio, or in other words, your acceleration. The higher it is, the more preceise your burns and maneuvers will be. It's just a question of fine tuning your maneuver nodes and of making sure you don't get past your periapsis.

[InF3RNo]

Seems I was burning too much late and that was the reason of the weird orbits, now I'll open a new thread with a new question, how to make the apoapsis near when burning to south or north, in this case, to south to reach the Kethane deposit, I'll make this one as answered!

This thread contains my new question

Edited July 7, 2013 by InF3RNo
Making a new question