Before revision: Discoverer 20 was operated in an Earth orbit, with a perigee of 283 km , an apogee of 770 km , 80.91° of inclination, and a period of 95.81 minutes.
After revision: Discoverer 20 was operated in an Earth orbit, with a perigee of , an apogee of , 80.91° of inclination, and a period of 95.81 minutes.