a. Making approximate measurements of the shapes of the elliptical orbits (i.e., try to determine b, the semi-minor axis), draw 5 different pictures, one for each of the 5 orbits, showing as much information as you can about each orbit. Write down assumptions about quantities you may not know exactly but have a general concept about. b Vertex Convertex a Centre K Co-vertex Centre 16 a 3 co-vertex 2 Vertex b vertex a Vertex Centre Vertex centre Co-vertex b a ertex 5 vertex Co-vertex Co-vertex b vertex centre a vertex Co-vertex