This plot shows how the perigee height of Phobus Grunt has evolved over the given time period.
The perigee is the lowest point of the orbit.
This plot shows how the apogee height of has evolved over the given time period.
The apogee is the highest point of the orbit.
This plot shows how the mean orbital height of has evolved over the given time period.
The mean height is defined as the semi-major axis (mean radius) minus the Earth's equatorial radius.
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