The first stable orbit I ever achieved was an eccentric orbit after overshooting my desired orbit, realizing I was above escape velocity, and panic-burning all my remaining fuel in an attempt to get back. The orbit stabilized hands-off with an apogee of 375,000-ish km, and a perigee of 51,000 km. I left the program running while the capsule was still headed deep into space (with the chute hanging out in hopes the capsule would reenter while I was gone) and when I got back home an hour later, the boys were still alive and still in space. The orbital period was about 47 minutes. After 8 hours, it was obvious that apogee and perigree weren't deviating more than 150m, so I shut it down.
