Watching the NASA JPL video NASA Launches InSight to Mars (Part 2) after MECO-2, the orbital parameters shown in the video don't make sense to me; specifically the apogee altitude.
At this point in time I believe the 2nd stage has passed escape velocity from Earth and is on its way to Mars, though there will be further maneuvers to prevent the 2nd stage from hitting the planet.
The perigee altitude is about 62 nautical miles, or about 115 km, but the apogee altitude is -3443.92 nautical miles, which is negative. However, using a factor of 1.852 that converts -6378.14, almost exactly matching the 6378.137 conventional value used for the equatorial radius of the Earth when converting altitudes to distances from center of the Earth.
I'm aware that using a negative semi-major axis is perfectly legitimate in some cases, when done with care, but not sure how to understand an apogee distance from Geocenter of precisely zero. Should the display really be showing NaN or blank because there is no meaningful value to display? Or could there in fact be some real math to understand here?