Answer:
 planet's orbital eccentricity and semi-major axis
Explanation:
The eccentricity and the semi - major axis controls the size and  shape of the orbit of the planet  . The value for the semi major axis is equal to the half of largest diameter of the elliptical orbit .
The eccentricity controls the shape of elliptical orbit . It is the ratio of the center to the focus ( sun ) length and the semi - major axis length . 
 
        
             
        
        
        
Explanation:
hydrogen, oxygen and fluorine 
 
        
             
        
        
        
Yes, this is true: 
Equator runs through the northern part of Lake Victoria (which is on the border between Kenya, Uganda and Tanzania). Specifically, it passes through some islands (the Ssese Islands, some of which are inhabited)  on Lake Victoria that belong to Uganda.