Allowable Eccentricities
I've figured out how to pick out the runs where the orbits of E and B intersect.
Out of about 22,000 runs, the orbits of E and B intersect only 200 times. Here is the contour plot of those doomed Mercury runs.

seen from Italy
seen from Indonesia
seen from United States
seen from China

seen from United States

seen from Indonesia

seen from Sweden
seen from China
seen from Russia

seen from United States
seen from Yemen
seen from South Korea

seen from Malaysia
seen from China
seen from United States
seen from United States

seen from Indonesia
seen from China

seen from Malaysia
seen from China
Allowable Eccentricities
I've figured out how to pick out the runs where the orbits of E and B intersect.
Out of about 22,000 runs, the orbits of E and B intersect only 200 times. Here is the contour plot of those doomed Mercury runs.