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A short period comet is conventionally defined as a comet having an orbital period of less than 200 years. What is the maximum possible aphelion distance for a short period comet with a perihelion of 0.5 AU? Where does this place the comet relative to the outer planets? (3)
1 The orbital period is equal to that for a circular orbit with the orbital radius equal to the semi-major axis ( a {\displaystyle a\,\!} ),  For a given semi-major axis the orbital period does not depend on the eccentricity (See also: Kepler's third law).