When the planet approaches its periastron or its apastron the colony migrates to the other pole, using enormous insulated trucks and the planet's sole road, built especially to be used once in four years.
22.
However, unlike Jupiter it has an apastron the distance is as much as 5.33 AU ( compared to the Solar System, distance from the Sun to the inner asteroid belt and from Sun to just beyond the orbit of Jupiter ).
23.
At periastron, the orbital distance is 3.60 AU and at apastron, the distance is 6.00 AU . The planet's mass is nearly 2 times that of Jupiter, but is likely to be smaller in size than the inner planet.
24.
The orbital distance ranges from 6.4 AU at periastron to 14.2 AU at apastron . 85 Peg BA may have a close, faint red dwarf companion 85 Peg BB within 2 AU from BA . The mass would be 11 % solar mass ( ).
25.
At periastron, the orbital distance from its parent star is 0.33 AU . At apastron, the distance is 1.71 AU . If this planet were in the Solar System, its orbit would range from just within Mercury s orbit to just beyond Mars s orbit.
26.
In a later simulation with the brown dwarf, 54 Piscium b's orbit " sweeps clean " most test particles within 0.5 AU, leaving only asteroids " in low-eccentricity orbits near the known planet s apastron distance, near the 1 : 2 mean-motion resonance ".
27.
The average orbital distance is 3.00 AU . At periastron distance, it will have distance from the star similar to Mars distance from the Sun at 1.56 AU . At apastron, the distance is 4.44 AU . These corresponds to the orbital eccentricity of 0.48.
28.
As a planet approaches periastron, its speed increases as it trades gravitational potential energy for kinetic energy, just as a falling object on Earth accelerates as it falls; as the planet reaches apastron, its speed decreases, just as an object thrown upwards on Earth slows down as it reaches the apex of its trajectory.
29.
As a result of this high eccentricity, the planet's distance from its star varies from 0.03 to 0.88 apastron it would receive an insolation similar to that of Earth, while at periastron the insolation would be around 800 times greater, far more than that experienced by Mercury in the Solar System.
30.
But unlike Jupiter, it orbits the star much closer, mean distance being only a third more than eccentric; at periastron, it is closer to itse star than Earth is from the Sun, whereas at apastron, it is further from its star than Mars to the Sun, finding itself on the outer edge of the habitable zone.
