EpiStellar Jovian Type

EpiStellar Jovians are primarily defined by their orbital radius, which is located 5AU or closer to their stellar primary.

These worlds are variable in mass, and initially form in the outer regions of their solar system, beyond the "snow line".  However, momentum loss through gravitation interactions within the accretion disk cause all Jovians to migrate inward, towards their star, until they no longer encounter disk material.  in many cases, this leaves the planets very close to the sun indeed, and many such worlds have orbital periods measured in days, or even hours.

The effects of such a close orbiting giant planet are many.  The planets themselves tend to show as blue worlds, due to sunlight scattering in the upper atmosphere, but more dramatic are those with close orbits.  The can appear as great bull's eyes as the sunward facing atmosphere is heated to a high degree.  Clouds stream away from this area, to congregate at the far side pole, where they cool and sink into the depths of the atmosphere, to flow back to the dayside and repeat the cycle.

The hot face of an EpiStellar Jovian world.

EpiStellar Jovians of Note


Orion's Arm

TV and Movies

Real Examples
HD 73256b
Gliese 86 b

HD 52265b

References and Sources


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ArcBuilder Universe concept John M. and Margo L. Dollan 2002-2004
This Page first uploaded June 26, 2004
Most recent update for this page June 26, 2004